CN115084605A - Catalyst slurry for water electrolyzer and preparation method thereof - Google Patents

Catalyst slurry for water electrolyzer and preparation method thereof Download PDF

Info

Publication number
CN115084605A
CN115084605A CN202210669444.9A CN202210669444A CN115084605A CN 115084605 A CN115084605 A CN 115084605A CN 202210669444 A CN202210669444 A CN 202210669444A CN 115084605 A CN115084605 A CN 115084605A
Authority
CN
China
Prior art keywords
catalyst
mixed solution
iridium oxide
water
water electrolyzer
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202210669444.9A
Other languages
Chinese (zh)
Inventor
肖维
马浩然
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hydrogen Energy Shenzhen Co ltd
Original Assignee
Hydrogen Energy Shenzhen Co ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Hydrogen Energy Shenzhen Co ltd filed Critical Hydrogen Energy Shenzhen Co ltd
Priority to CN202210669444.9A priority Critical patent/CN115084605A/en
Publication of CN115084605A publication Critical patent/CN115084605A/en
Pending legal-status Critical Current

Links

Images

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M8/00—Fuel cells; Manufacture thereof
    • H01M8/10—Fuel cells with solid electrolytes
    • H01M8/1004—Fuel cells with solid electrolytes characterised by membrane-electrode assemblies [MEA]
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B82—NANOTECHNOLOGY
    • B82Y—SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES; MEASUREMENT OR ANALYSIS OF NANOSTRUCTURES; MANUFACTURE OR TREATMENT OF NANOSTRUCTURES
    • B82Y30/00—Nanotechnology for materials or surface science, e.g. nanocomposites
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B82—NANOTECHNOLOGY
    • B82Y—SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES; MEASUREMENT OR ANALYSIS OF NANOSTRUCTURES; MANUFACTURE OR TREATMENT OF NANOSTRUCTURES
    • B82Y40/00—Manufacture or treatment of nanostructures
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M4/00—Electrodes
    • H01M4/86—Inert electrodes with catalytic activity, e.g. for fuel cells
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M4/00—Electrodes
    • H01M4/86—Inert electrodes with catalytic activity, e.g. for fuel cells
    • H01M4/88—Processes of manufacture
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M4/00—Electrodes
    • H01M4/86—Inert electrodes with catalytic activity, e.g. for fuel cells
    • H01M4/90—Selection of catalytic material
    • H01M4/92—Metals of platinum group
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/30—Hydrogen technology
    • Y02E60/50—Fuel cells

Abstract

The invention relates to a water electrolyzer catalyst slurry and a preparation method thereof, wherein the raw materials for preparing the water electrolyzer catalyst slurry comprise a catalyst, perfluorosulfonic acid, a dispersing agent and deionized water; wherein the catalyst comprises iridium oxide and platinum black. Compared with an iridium oxide catalyst, the method has the advantages that a certain amount of platinum black is added into the catalyst slurry of the water electrolyzer, so that the adsorption state of an oxygen evolution reaction intermediate can be effectively regulated and controlled, the step time is shortened on an oxygen evolution reaction kinetic mechanism, and the Tafel slope of the catalyst is increased, so that the catalytic activity of the oxygen evolution reaction is increased; in addition, platinum atoms are scattered and inserted between the original iridium oxide molecules, so that the distance between the iridium oxide molecules can be increased, more catalytic active sites are exposed on a microscopic level, the iridium loading capacity is reduced, the reaction activity is not lost, more effective reaction sites are reserved, and the iridium oxide is not easy to fall off in a long-term stability test; platinum is introduced on the surface of the iridium oxide, so that the conductivity is greatly increased, and the ohmic resistance of the catalytic layer is reduced.

Description

Catalyst slurry for water electrolyzer and preparation method thereof
Technical Field
The invention relates to the technical field of energy batteries, in particular to catalyst slurry for a water electrolyzer and a preparation method thereof.
Background
The Membrane Electrode Assembly (MEA) is a core component of a Proton Exchange Membrane (PEM) and plays an important role in transferring deionized water and exhaust gas, as well as a site where electrochemical reaction proceeds. The membrane electrode comprises an anode catalyst layer, a proton exchange membrane and a cathode catalyst layer, wherein the anode catalyst layer generates Oxygen Evolution Reaction (OER), the cathode catalyst layer generates Hydrogen Evolution Reaction (HER), and the proton exchange membrane is used for conducting protons and isolating hydrogen and oxygen.
The three-phase interface and the spatial configuration of a catalytic layer in a membrane electrode are determined by water electrolyzer catalyst slurry, the existing membrane electrode water electrolyzer catalyst slurry is usually prepared by an iridium oxide catalyst, perfluorosulfonic acid and deionized water alcohol solution through dispersion processes such as ultrasonic treatment, stirring and the like, but the conductivity of the prepared membrane electrode is poor due to poor conductivity of the iridium oxide.
Disclosure of Invention
Based on the above, the invention provides the water electrolyzer catalyst slurry with good conductivity and the preparation method thereof.
A water electrolyzer catalyst slurry is prepared by the following raw materials:
a catalyst;
a perfluorosulfonic acid;
a dispersant; and
deionized water;
wherein the catalyst comprises iridium oxide and platinum black;
the mass ratio of iridium element in the iridium oxide to platinum element in the platinum black is (0.5-1): 1.
Preferably, the mass ratio of the iridium element in the iridium oxide to the platinum element in the platinum black is (0.5-0.8): 1.
Preferably, the mass ratio of the perfluorosulfonic acid to the catalyst is 0.3-0.6.
Preferably, the dispersant comprises at least one of n-propanol, isopropanol, ethanol, and ethylene glycol.
The invention also provides a preparation method of the water electrolysis bath catalyst slurry, which comprises the following steps:
adding deionized water, a dispersing agent and perfluorosulfonic acid into the iridium oxide and the platinum black to obtain a mixture;
and dispersing the mixture to obtain the catalyst slurry for the water electrolyzer.
Preferably, the dispersion treatment comprises the following specific steps:
and performing ball milling, ultrasonic treatment, stirring and defoaming treatment on the mixed solution to obtain the water electrolysis bath catalyst slurry.
Preferably, the dispersion treatment comprises the following specific steps:
performing ball milling treatment on the mixed solution to obtain a first mixed solution;
carrying out ultrasonic treatment on the first mixed solution to obtain a second mixed solution;
stirring the second mixed solution to obtain a third mixed solution;
and defoaming the third mixed solution to obtain the water electrolysis bath catalyst slurry.
Preferably, in the step of ball milling, the ball milling time is 24-72 h.
Preferably, in the step of subjecting to ultrasonic treatment, the power of ultrasonic treatment is 300-500W.
Preferably, in the step of stirring, the rotation speed of the stirring is 10000-30000 rpm.
Compared with the prior art, the invention has the following beneficial effects:
according to the invention, a certain amount of platinum black, namely platinum nanoparticles, is added into the catalyst slurry of the water electrolyzer, compared with a pure iridium or iridium oxide catalyst, the catalyst prepared by the invention can effectively regulate and control the adsorption state of an oxygen evolution reaction intermediate, the step time is shortened on an oxygen evolution reaction kinetic mechanism, and the Tafel (Tafel) slope of the catalyst is increased, so that the catalytic activity of the oxygen evolution reaction is increased; in addition, platinum atoms are scattered and inserted between the original iridium oxide molecules, so that the distance between the iridium oxide molecules can be increased, more catalytic active sites are exposed on a microscopic level, the reaction activity is not lost while the iridium loading is reduced, and meanwhile, more effective reaction sites are reserved, so that the catalyst is not easy to fall off in a long-term stability test; more importantly, platinum is introduced into the surface of the iridium oxide, so that the conductivity of the iridium oxide is greatly increased, and the ohmic resistance of the catalytic layer is reduced.
Drawings
FIG. 1 is a graph showing the results of performance test tests of examples 1 and 2 and comparative examples 1 and 2;
FIG. 2 is a graph showing the results of the AC impedance test of examples 1 and 2 and comparative example 2;
FIG. 3 is a graph of the results of the four probe resistivity test of examples 1, 2 and comparative example 2;
fig. 4 is a particle size distribution diagram of the water electrolyzer catalyst slurry of example 2 and comparative example 3.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The experimental procedures in the following examples are conventional unless otherwise specified. Test materials, reagents and the like used in the following examples are commercially available unless otherwise specified. In the quantitative tests in the following examples, three replicates were set, and the data are the mean or the mean ± standard deviation of the three replicates.
In addition, "and/or" in the whole text includes three schemes, taking a and/or B as an example, and includes a technical scheme a, a technical scheme B, and a technical scheme that a and B meet simultaneously; in addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination of technical solutions should be considered to be absent and not be within the protection scope of the present invention.
The invention provides a water electrolyzer catalyst slurry, which is prepared from raw materials including a catalyst, perfluorosulfonic acid, a dispersing agent and deionized water; the catalyst comprises iridium oxide and platinum black, wherein the mass ratio of iridium in the iridium oxide to platinum in the platinum black is (0.5-1): 1.
specifically, a certain amount of platinum black, namely platinum nanoparticles, is added into the catalyst slurry of the water electrolyzer, and compared with a pure iridium or iridium oxide catalyst, the catalyst prepared by the method can effectively regulate and control the adsorption state of an oxygen evolution reaction intermediate, shorten the step time on an oxygen evolution reaction kinetics mechanism, and increase the Tafel (Tafel) slope of the catalyst, so that the catalytic activity of the oxygen evolution reaction is increased; in addition, platinum atoms are scattered and inserted between the original iridium oxide molecules, so that the distance between the iridium oxide molecules can be increased, more catalytic active sites are exposed on a microscopic level, the reaction activity is not lost while the iridium loading is reduced, and meanwhile, more effective reaction sites are reserved, so that the catalyst is not easy to fall off in a long-term stability test; more importantly, platinum is introduced into the surface of the iridium oxide, so that the conductivity of the iridium oxide is greatly increased, and the ohmic resistance of the catalytic layer is reduced. In some embodiments, the purity of the iridium oxide is 99.9% and the purity of the platinum black is 95.0%.
Preferably, the mass ratio of iridium element in iridium oxide to platinum element in platinum black is (0.5-0.8): 1.
in some embodiments, the mass ratio of perfluorosulfonic acid to catalyst is 0.3 to 0.6.
In some embodiments, the dispersant comprises at least one of n-propanol, isopropanol, ethanol, and ethylene glycol.
The invention also provides a preparation method of the water electrolysis bath catalyst slurry, which comprises the following steps:
adding deionized water, a dispersing agent and perfluorosulfonic acid into iridium oxide and platinum black to obtain a mixture;
and dispersing the mixture to obtain the catalyst slurry for the water electrolyzer.
In some embodiments, the specific steps of the dispersion process include:
and performing ball milling, ultrasonic treatment, stirring and defoaming treatment on the mixed solution to obtain the water electrolyzer catalyst slurry.
In some embodiments, the specific steps of the dispersion process include:
s100, performing ball milling treatment on the mixed solution to obtain a first mixed solution.
In some embodiments, in the step of ball milling, the rotation speed of the ball milling is 150-250 rpm, and the time of the ball milling is 24-72 h.
S200, subjecting the first mixed solution to ultrasonic treatment to obtain a second mixed solution.
In some embodiments, in the step of ultrasonic treatment, the power of ultrasonic treatment is 300-500W, and the time of ultrasonic treatment is 15-30 min.
In particular, the purpose of the ultrasonic treatment is to further disperse the slurry by means of ultrasonic flow and cavitation.
And S300, stirring the second mixed solution to obtain a third mixed solution.
In some embodiments, in the step of stirring, the rotation speed of the stirring is 10000-30000 rpm, and the stirring time is 15-30 min.
In the invention, three dispersion modes, namely ball milling, ultrasonic treatment and stirring, are combined,
s400, defoaming the third mixed solution to obtain the water electrolyzer catalyst slurry.
Specifically, the defoaming treatment can eliminate bubbles generated during the dispersion treatment (steps S100, S200, and S300), and thus can effectively prevent the catalytic layer from generating defects such as pinholes and cracks during the subsequent coating process.
Example 1
0.438g of iridium oxide with the purity of 99.9% and 0.491g of platinum black with the purity of 95.0% (the mass ratio of iridium element to platinum element is 0.8:1) are weighed, 0.994g of deionized water is slowly added to the mixture to fully soak the catalyst, then 0.994g of n-propanol is added, and finally 2.083g of perfluorosulfonic acid solution is added to obtain a mixed solution.
S100, ball-milling the mixed solution for 24 hours by using a ball mill, wherein the revolution is 200rpm, and obtaining a first mixed solution.
S200, crushing the first mixed solution by using ultrasonic cells for 30 minutes at the power of 400W to obtain a second mixed solution.
And S300, stirring the second mixed solution at a high speed for 30 minutes at the rotating speed of 20000rpm to obtain a third mixed solution.
And (5) placing the third mixed solution in a defoaming machine for defoaming for 15 minutes under negative pressure, and eliminating bubbles generated in the dispersion treatment (steps S100, S200 and S300) to obtain the water electrolysis bath catalyst slurry.
Example 2
0.3303g of iridium oxide with the purity of 99.9% and 0.547g of platinum black with the purity of 95.0% (the mass ratio of iridium element to platinum element is 0.5:1) were weighed, 0.893g of deionized water was slowly added thereto to sufficiently wet the catalyst, then 0.893g of n-propanol was added, and finally 2.344g of a perfluorosulfonic acid solution was added to obtain a mixed solution.
S100, ball-milling the mixed solution for 24 hours by using a ball mill, wherein the revolution is 200rpm, and obtaining a first mixed solution.
S200, crushing the first mixed solution by using ultrasonic cells for 30 minutes at the power of 400W to obtain a second mixed solution.
And S300, stirring the second mixed solution at a high speed for 30 minutes at the rotating speed of 20000rpm to obtain a third mixed solution.
And (5) placing the third mixed solution in a defoaming machine for defoaming for 15 minutes under negative pressure, and eliminating bubbles generated in the dispersion treatment (steps S100, S200 and S300) to obtain the water electrolysis bath catalyst slurry.
Example 3
Weighing 0.490g of iridium oxide with the purity of 99.9 percent and 0.439g of platinum black with the purity of 95.0 percent, wherein the mass ratio of iridium element to platinum element is 1:1), slowly adding 0.994g of deionized water into the iridium oxide and the platinum black, fully infiltrating the catalyst, then adding 0.994g of n-propanol, and finally adding 2.083g of perfluorosulfonic acid solution to obtain a mixed solution.
S100, ball-milling the mixed solution for 24 hours by using a ball mill, wherein the revolution is 200rpm, and obtaining a first mixed solution.
S200, crushing the first mixed solution by using ultrasonic cells for 30 minutes at the power of 400W to obtain a second mixed solution.
And S300, stirring the second mixed solution at a high speed for 30 minutes at the rotating speed of 20000rpm to obtain a third mixed solution.
And (5) placing the third mixed solution in a defoaming machine for defoaming for 15 minutes under negative pressure, and eliminating bubbles generated in the dispersion treatment (steps S100, S200 and S300) to obtain the water electrolysis bath catalyst slurry.
Comparative example 1
1.007g of iridium oxide with the purity of 99.9 percent and 0.101g of platinum black with the purity of 95.0 percent (the mass ratio of iridium element to platinum element is 9:1) are weighed, 2.287g of deionized water is slowly added into the mixture to fully soak the catalyst, and finally 1.517g of perfluorosulfonic acid solution is added to obtain a mixed solution.
S100, ball-milling the mixed solution for 24 hours by using a ball mill, wherein the revolution is 200rpm, and obtaining a first mixed solution.
S200, crushing the first mixed solution by using ultrasonic cells for 30 minutes at the power of 400W to obtain a second mixed solution.
And S300, stirring the second mixed solution at a high speed for 30 minutes at the rotating speed of 20000rpm to obtain a third mixed solution.
And (5) placing the third mixed solution in a defoaming machine for defoaming for 15 minutes under negative pressure, and eliminating bubbles generated in the dispersion treatment (steps S100, S200 and S300) to obtain the water electrolysis bath catalyst slurry.
Comparative example 2
1.19g of iridium oxide having a purity of 99.9% was weighed, 1.143g of deionized water was slowly added thereto to sufficiently wet the catalyst, 1.143g of n-propanol was then added, and 1.517g of a perfluorosulfonic acid solution was finally added to obtain a mixed solution.
S100, ball-milling the mixed solution for 24 hours by using a ball mill at the revolution of 200rpm to obtain a first mixed solution.
S200, crushing the first mixed solution for 30 minutes by using ultrasonic cells, wherein the power is 400W, and obtaining a second mixed solution.
And S300, stirring the second mixed solution at a high speed for 30 minutes at the rotating speed of 20000rpm to obtain a third mixed solution.
And (5) placing the third mixed solution in a defoaming machine for defoaming for 15 minutes under negative pressure, and eliminating bubbles generated in the dispersion treatment (steps S100, S200 and S300) to obtain the water electrolysis bath catalyst slurry.
Comparative example 3
0.438g of iridium oxide having a purity of 99.9% and 0.491g of platinum black having a purity of 95.0% (the mass ratio of iridium element to platinum element is 0.8:1) were weighed, 0.893g of deionized water was slowly added thereto to sufficiently wet the catalyst, then 0.893g of n-propanol was added, and finally 2.344g of a perfluorosulfonic acid solution was added to obtain a mixed solution.
S100, ball-milling the mixed solution for 24 hours by using a ball mill, wherein the revolution is 200rpm, and obtaining a first mixed solution.
And (3) placing the first mixed solution in a defoaming machine for defoaming for 15 minutes under negative pressure, and eliminating bubbles generated in the dispersion treatment (step S100) to obtain the water electrolysis bath catalyst slurry.
The water electrolysis cell catalyst slurries prepared in examples 1 and 2 and comparative examples 1, 2 and 3 were used to prepare film-forming electrodes, and assembled into electrolysis cells, and performance tests were conducted thereon.
The test condition is 40 ℃, and the effective area of the membrane electrode is 36cm 2 The test was performed in a constant current mode using a kemu chemical Nafion 115 membrane with a porous diffusion layer of titanium felt, and the results are shown in fig. 1.
The anode noble metal loading in example 1 was calculated by weighing to be 1.289mg Ir /cm 2 And 1.611mg Pt /cm 2 The anode noble metal loading in example 2 was 1.133mg Ir /cm 2 And 2.227mg Pt /cm 2 Comparative example 1 anode noble metal loading of 2.655mgIr/cm2 and 0.295mg Pt /cm 2 Comparative example 2 anode noble metal loading of 2.80mg Ir /cm 2 . The above sample cathode noble metal carrierThe amounts were all 0.37mg Pt /cm 2 。
As can be seen from FIG. 1, the concentration is 2A/cm 2 The voltage of example 1 was 2.32V, the voltage of example 2 was 2.24V, and the voltage of comparative example 2 was 2.54V at the current density of (2). Comparative example 1 at 1A/cm 2 The voltage was 2.75V at the current density of (2).
From the above data, it can be shown that examples 1 and 2 greatly improve the performance of the water electrolyte membrane electrode under the condition of reducing the iridium loading compared with comparative examples 1 and 2.
In order to analyze the cause of the change in the performance of the electrolytic cell after the addition of platinum black to the anode catalyst layer. The cell was subjected to alternating current impedance testing (EIS) at multiple current densities, the results of which are shown in fig. 2.
The four probe resistivity test was performed on the cell and the results are shown in figure 3.
As shown in FIG. 2, it can be found from the data of examples 1 and 2 and comparative example 2 that the High Frequency Resistance (HFR) of examples 1 and 2 is greatly reduced at 1A/cm as compared with comparative example 2 (only iridium oxide is added) 2 At a current density of (2), the high-frequency resistance of comparative example 2 was 0.205. omega. cm 2 Whereas example 1 is only 0.162. omega. cm 2 Example 2 is only 0.153. omega. cm 2 (ii) a As shown in fig. 3, the resistivity of comparative example 2 was 8 Ω cm, while the resistivity of both example 1 and example 2 was 0.25. The result shows that the platinum black is doped in the anode catalyst layer (iridium oxide), so that the conductivity of the catalyst layer can be greatly improved, the high-frequency resistance of the electrolytic cell is reduced, and the performance of the electrolytic cell is improved.
The results of examining the particle size distribution of the particles in the catalyst slurry for a water electrolyzer obtained in example 2 and comparative example 3 using a nano-particle size analyzer are shown in fig. 4.
Comparative example 3 is a water electrolyser catalyst slurry dispersed by ball milling only, and example 2 is a water electrolyser catalyst slurry dispersed using a combination of high speed agitation, ultrasonic cell disruption and ball milling. As can be seen from FIG. 3, the particle size of the catalyst slurry for the water electrolyzer in comparative example 3 is concentrated at about 350nm, while the particle size of the catalyst slurry for the water electrolyzer in example 2 is concentrated at about 140nm after the large particles are broken through the combined dispersion process, which shows that the combined dispersion process greatly improves the dispersion effect of the catalyst slurry for the water electrolyzer.
Specifically, the better the dispersion effect of the catalyst, the larger the specific surface area of the catalyst, the more active sites are exposed by the catalyst.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims (10)

1. The catalyst slurry for the water electrolysis cell is characterized by comprising the following raw materials:
a catalyst;
a perfluorosulfonic acid;
a dispersant; and
deionized water;
wherein the catalyst comprises iridium oxide and platinum black;
the mass ratio of iridium element in the iridium oxide to platinum element in the platinum black is (0.5-1): 1.
2. The catalyst paste for a water electrolyzer according to claim 1, characterized in that the mass ratio of iridium element in the iridium oxide to platinum element in the platinum black is (0.5-0.8): 1.
3. The catalyst paste for a water electrolyzer of claim 1, wherein the mass ratio of the perfluorosulfonic acid to the catalyst is 0.3 to 0.6.
4. The water electrolyser catalyst paste of claim 1 wherein said dispersant comprises at least one of n-propanol, isopropanol, ethanol and ethylene glycol.
5. The method for preparing the catalyst slurry for the water electrolyzer of claims 1 to 4, characterized in that the method for preparing the catalyst slurry for the water electrolyzer comprises the following steps:
adding deionized water, a dispersing agent and perfluorosulfonic acid into the iridium oxide and the platinum black to obtain a mixture;
and dispersing the mixture to obtain the catalyst slurry for the water electrolyzer.
6. The method for preparing a catalyst paste for a water electrolyzer of claim 5, characterized in that the specific steps of the dispersion treatment include:
and performing ball milling, ultrasonic treatment, stirring and defoaming treatment on the mixed solution to obtain the water electrolysis bath catalyst slurry.
7. The method for preparing a catalyst paste for a water electrolyzer of claim 5, characterized in that the specific steps of the dispersion treatment include:
performing ball milling treatment on the mixed solution to obtain a first mixed solution;
carrying out ultrasonic treatment on the first mixed solution to obtain a second mixed solution;
stirring the second mixed solution to obtain a third mixed solution;
and defoaming the third mixed solution to obtain the water electrolysis bath catalyst slurry.
8. The method for preparing a catalyst slurry for a water electrolyzer according to claim 7, characterized in that in the step of subjecting the slurry to ball milling treatment, the ball milling treatment time is 24-72 hours.
9. The method for preparing a catalyst paste for a water electrolyzer according to claim 7, characterized in that in the step of subjecting the slurry to ultrasonic treatment, the power of the ultrasonic treatment is 300 to 500W.
10. The method for preparing a catalyst paste for a water electrolyzer according to claim 7, characterized in that in the step of subjecting the slurry to stirring treatment, the rotation speed of the stirring treatment is 10000 to 30000 rpm.
CN202210669444.9A 2022-06-14 2022-06-14 Catalyst slurry for water electrolyzer and preparation method thereof Pending CN115084605A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202210669444.9A CN115084605A (en) 2022-06-14 2022-06-14 Catalyst slurry for water electrolyzer and preparation method thereof

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202210669444.9A CN115084605A (en) 2022-06-14 2022-06-14 Catalyst slurry for water electrolyzer and preparation method thereof

Publications (1)

Publication Number Publication Date
CN115084605A true CN115084605A (en) 2022-09-20

Family

ID=83251963

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202210669444.9A Pending CN115084605A (en) 2022-06-14 2022-06-14 Catalyst slurry for water electrolyzer and preparation method thereof

Country Status (1)

Country Link
CN (1) CN115084605A (en)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20030068544A1 (en) * 2001-10-10 2003-04-10 Alan Cisar Bifunctional catalytic electrode
JP2007012315A (en) * 2005-06-28 2007-01-18 National Institute Of Advanced Industrial & Technology Water electrolysis/fuel cell reversible cell of solid polyelectrolyte type, and its oxygen electrode
JP2009209379A (en) * 2008-02-29 2009-09-17 Mitsubishi Heavy Ind Ltd Water electrolysis apparatus
CN114395779A (en) * 2022-01-06 2022-04-26 清华大学 Catalyst for PEM water electrolysis, preparation method and application thereof

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20030068544A1 (en) * 2001-10-10 2003-04-10 Alan Cisar Bifunctional catalytic electrode
JP2007012315A (en) * 2005-06-28 2007-01-18 National Institute Of Advanced Industrial & Technology Water electrolysis/fuel cell reversible cell of solid polyelectrolyte type, and its oxygen electrode
JP2009209379A (en) * 2008-02-29 2009-09-17 Mitsubishi Heavy Ind Ltd Water electrolysis apparatus
CN114395779A (en) * 2022-01-06 2022-04-26 清华大学 Catalyst for PEM water electrolysis, preparation method and application thereof

Similar Documents

Publication Publication Date Title
TW398097B (en) Gas diffusion electrodes based on poly (vinylidene fluoride) carbon blends
US6187468B1 (en) Electrodes for fuel cells
CN111900420A (en) Anode catalyst slurry, anode catalyst layer, membrane electrode and fuel cell
JP2007335338A (en) Method for manufacturing electrode catalyst for fuel cell, electrode catalyst for fuel cell and polymer electrolyte fuel cell equipped with the same
US20030134739A1 (en) Catalyst agglomerates for membrane electrode assemblies
CN103403936A (en) Unitized electrode assembly with high equivalent weight ionomer
Barnett et al. Effect of infiltration on performance of Ni-YSZ fuel electrodes
CN114899430B (en) Fuel cell CCM with high durability and anti-counter pole and preparation method thereof
CN115084605A (en) Catalyst slurry for water electrolyzer and preparation method thereof
CN114079071B (en) Preparation method and application of self-supporting membrane electrode
CN114808000A (en) Construction method of efficient and stable PEM (proton exchange membrane) electrolyzed water anode catalyst layer
CN112993284B (en) Electrolytic water catalyst layer and manufacturing method thereof
Lo et al. Electrophoretic deposited Pt/C/SiO2 anode for self-humidifying and improved catalytic activity in PEMFC
CN114188582A (en) Fuel cell membrane electrode ionomer pretreatment method
hee Song et al. Study on a drasitically hydrogen consumption saving conditioning method for Polymer electrolyte membrane fuel cell
CN114792831A (en) High-performance long-life anti-reverse electrode membrane electrode and preparation method thereof
Blackmore et al. Engineered nano-scale ceramic supports for PEM fuel cells
CN112310421A (en) Electrode for fuel cell, membrane electrode assembly, chip, catalyst layer, catalyst dispersion, and method for producing same
CN113629264B (en) Catalyst slurry for fuel cell and preparation method and application thereof
JP2004047386A (en) Electrode catalyst for solid polymer electrolyte fuel cell
Kunz Lessons learned from phosphoric acid electrolyte fuel cell development pertinent to PEMFCs
RU2744103C1 (en) Method for manufacturing a self-humidifying electrocatalyst for hydrogen-air fuel cells
CN117543035B (en) Nafion-C/CeO2Pt composite membrane and preparation method and application thereof
Yasufuku et al. Investigation of a Correlation Between IV Performance and Cathode Structure for MEAs Using Mesoporous Carbon Supports
CN112310420A (en) Electrode for fuel cell, membrane electrode assembly, chip, catalyst layer, catalyst dispersion liquid, and method for producing same

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination