CN116259769A - Size-controllable carbon-supported PtZn intermetallic compound electrocatalyst, and preparation method and application thereof - Google Patents

Size-controllable carbon-supported PtZn intermetallic compound electrocatalyst, and preparation method and application thereof Download PDF

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CN116259769A
CN116259769A CN202111502729.5A CN202111502729A CN116259769A CN 116259769 A CN116259769 A CN 116259769A CN 202111502729 A CN202111502729 A CN 202111502729A CN 116259769 A CN116259769 A CN 116259769A
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ptzn
intermetallic compound
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王素力
张宏
李焕巧
孙公权
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Dalian Institute of Chemical Physics of CAS
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    • 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
    • H01M4/921—Alloys or mixtures with metallic elements
    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25B—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES FOR THE PRODUCTION OF COMPOUNDS OR NON-METALS; APPARATUS THEREFOR
    • C25B11/00—Electrodes; Manufacture thereof not otherwise provided for
    • C25B11/04—Electrodes; Manufacture thereof not otherwise provided for characterised by the material
    • C25B11/051—Electrodes formed of electrocatalysts on a substrate or carrier
    • C25B11/054—Electrodes comprising electrocatalysts supported on a carrier
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    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
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    • C25B11/057—Electrodes formed of electrocatalysts on a substrate or carrier characterised by the substrate or carrier material consisting of a single element or compound
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    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
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    • C25B11/04—Electrodes; Manufacture thereof not otherwise provided for characterised by the material
    • C25B11/051—Electrodes formed of electrocatalysts on a substrate or carrier
    • C25B11/073—Electrodes formed of electrocatalysts on a substrate or carrier characterised by the electrocatalyst material
    • C25B11/075—Electrodes formed of electrocatalysts on a substrate or carrier characterised by the electrocatalyst material consisting of a single catalytic element or catalytic compound
    • C25B11/089—Alloys
    • 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
    • H01M4/925—Metals of platinum group supported on carriers, e.g. powder carriers
    • H01M4/926—Metals of platinum group supported on carriers, e.g. powder carriers on carbon or graphite
    • 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
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Abstract

The invention discloses a size-controllable carbon-supported PtZn intermetallic compound electrocatalyst and a preparation method and application thereof, belonging to the technical field of nano catalysts and preparation thereof. The electrocatalyst is PtZn intermetallic compound with a long-range ordered face-centered tetragonal structure, pt and Zn are alternately arranged according to atomic layers, and the atomic ratio of Pt to Zn is close to 1:1; the long-range ordered structure not only enables the regulation and control effect of transition metal to be fully exerted, but also enables the chemical bond formed by the transition metal and Pt atoms to be more stable, so that the transition metal atoms are not easy to dissolve under the acidic condition, and further catalytic activity and stability are further improved. Under the condition of not introducing a surfactant and a protective agent, the invention can obtain PtZn intermetallic compound electrocatalysts with different sizes, and the preparation method has the advantages of simplicity, easiness in implementation and the like.

Description

Size-controllable carbon-supported PtZn intermetallic compound electrocatalyst, and preparation method and application thereof
Technical Field
The invention belongs to the technical field of nano catalysts and preparation thereof, and particularly relates to synthesis of a carbon-supported PtZn intermetallic compound with controllable size and application thereof in oxygen reduction reactions of proton exchange membrane fuel cells, high-temperature phosphoric acid fuel cells and other acidic environments.
Background
The energy is the dynamic of national economy development and is also an important index for measuring comprehensive national power, national civilization development degree and the living standard of people. The proton exchange membrane fuel cell is used as an electrochemical power generation device, and does not pass through a heat engine process, so that the proton exchange membrane fuel cell is not limited by Carnot cycle, and the energy conversion efficiency is high (40% -60%); is environment friendly, and hardly emits nitrogen oxides and sulfur oxides. Currently, pt-based electrocatalysts remain the first choice for commercial proton exchange membrane fuel cells, and they have excellent activity and durability in acidic media compared to non-noble metal electrocatalysts, thus increasing ORR rates. However, pt-based electrocatalysts account for about 40-50% of the cost due to the rarity of Pt metal. Therefore, it is still very important to develop a platinum-based electrocatalyst having higher oxygen reduction activity and higher stability.
At present, in order to reduce the dosage of Pt and improve the activity of the Pt/C electrocatalyst, researchers do a lot of work, including alloying the Pt-based electrocatalyst, reducing the proportion of alloy components of the Pt-based electrocatalyst, optimizing the particle size and crystal face, and adopting an ordered intermetallic compound structure. However, for the preparation of intermetallic compound electrocatalysts at present, a surfactant and a protective agent (such as cetyl trimethylammonium bromide, tri-n-octyl phosphine oxide, siO2, mgO and the like) are mostly added into a reaction system, so that the growth of alloy particles under high-temperature heat treatment is limited, and thus small-particle intermetallic compound electrocatalysts are obtained. This not only increases the difficulty and complexity of preparation, but also introduces additional impurities into the original system, affecting the intrinsic activity and electrochemical active area of the electrocatalyst.
Disclosure of Invention
In view of the above, the present invention aims to provide a size-controllable carbon-supported PtZn intermetallic compound electrocatalyst, and a preparation method and application thereof. Under the condition of not introducing additional surfactant or protective agent, the preparation method can obtain highly ordered carbon-supported PtZn intermetallic compound electrocatalyst with different particle sizes, is simple and easy to implement, has the potential of large-scale preparation, and has activity and stability superior to those of commercial platinum carbon.
In order to achieve the above purpose, the present invention is implemented by adopting the following technical scheme:
a size-controllable carbon-supported PtZn intermetallic compound electrocatalyst is of a long-range ordered face-centered tetragonal structure, ptZn alloy is highly ordered, pt and Zn are alternately arranged according to atomic layers, and the atomic ratio of Pt to Zn is close to 1:1.
Further, the diameter of the size-controllable carbon-supported PtZn intermetallic compound electrocatalyst is 5-10 nm.
In another aspect, the present invention provides a method for preparing the carbon-supported PtZn intermetallic compound electrocatalyst, which mainly includes the following steps:
(1) Respectively transferring a certain amount of platinum ion/organic solvent precursor solution and zinc ion/organic solvent precursor solution into a reaction container, then adding alkali liquor dissolved in the organic solvent, controlling pH to be more than 13, uniformly dispersing by ultrasonic, adding amorphous carbon powder dispersion liquid dispersed in the organic solvent, and continuing uniformly dispersing by ultrasonic to obtain uniformly dispersed slurry;
(2) Stirring and preserving heat for 2-5 hours at the temperature of 110-130 ℃, cooling to 60-80 ℃, adding a proper amount of deionized water, continuously stirring and preserving heat for 2-5 hours, washing with water, filtering, drying, and grinding to obtain solid powder;
(3) And (3) carrying out heat treatment on the solid powder obtained in the step (2) for 1-4 hours at 500-700 ℃ in a hydrogen/inert gas atmosphere to obtain the carbon-supported PtZn intermetallic compound electrocatalyst, or carrying out acid washing after heat treatment to obtain the carbon-supported PtZn intermetallic compound electrocatalyst.
Further, the organic solvent in step (1) includes ethylene glycol.
Further, the source of platinum ions in step (1) is selected from the group consisting of platinum chlorate, potassium chloroplatinate, potassium chloroplatinite; the zinc ion source is selected from zinc nitrate, zinc chloride, and zinc sulfate.
Further, the alkaline component in the alkali liquor in the step (1) is NaOH or KOH.
Further, in the step (1), the molar ratio of zinc ions to platinum ions is 2:1-20:1, and the ultrasonic time is 30 min-3 h; the pH value of the slurry is controlled to be 13-14, and the final concentration of platinum ions is 0.1-20 mM.
Further, the mass ratio of the total mass of zinc ions and platinum ions to amorphous carbon powder in the step (1) is 1:100-1:2.
Further, after the stirring and heat preservation in the step (2) are finished, the pH value of the slurry is controlled to be 7-9.
Further, the specific process of the water washing in the step (2) is washing by using ultrapure water, and the washing is finished when the XRF detects that no chloride ions exist in the filtrate.
Further, the drying in the step (2) is specifically vacuum drying, and the temperature is 40-90 ℃.
Further, the heat treatment in the step (3) is carried out in a tube furnace, the heating rate is controlled to be 1-5 ℃/min, and the cooling rate is controlled to be 1-2 ℃/min; the pickling time is determined according to the Zn content in the solid powder after the high-temperature heat treatment.
Further, the inert gas in the step (3) includes nitrogen, argon, helium and neon.
Further, the specific process of the heat treatment in the step (3) is as follows: under the reducing atmosphere of hydrogen/argon with the volume ratio of 10:90, the solid powder obtained in the step (2) is heated to 500-700 ℃ at the speed of 5 ℃/min and kept for 1-4 hours; and naturally cooling to room temperature.
Further, the temperature of the heat treatment in the step (3) is 600 ℃ and the time is 1-2 hours.
Further, the specific process of the acid washing in the step (3) is to wash it with 0.1M HClO 4 Pickling for 4-12 h.
The invention also provides application of the carbon-supported PtZn intermetallic compound electrocatalyst in oxidation-reduction reaction in an acidic environment.
Further, the application includes application in proton exchange membrane fuel cells and high temperature phosphoric acid fuel cells.
Compared with the prior art, the size-controllable carbon-supported PtZn intermetallic compound electrocatalyst has the following advantages:
1. the preparation method does not introduce additional surfactant and protective agent, has simple synthesis system, is convenient and effective, and has the potential of large-scale production;
2. compared with a single Pt/C catalyst, the electrocatalyst improves the catalytic performance through alloying, and reduces the cost of the electrocatalyst;
3. according to the ordered alloy catalyst preparation method, the oxygen reduction activity and stability of the electrocatalyst are further improved;
4. the particle size of the prepared carbon-supported PtZn intermetallic compound is controllable;
5. the catalyst has wide application range and can be used as oxygen reduction electrocatalyst in proton exchange membrane fuel cells, high-temperature phosphoric acid electrolyte fuel cells and other acidic environments.
Drawings
In order to more clearly illustrate the embodiments of the present invention, the drawings to which the embodiments relate will be briefly described.
FIG. 1 is an X-ray diffraction pattern (XRD) of carbon-supported PtZn electrocatalysts of different particle sizes prepared in examples 1 to 5.
FIG. 2 is an X-ray diffraction pattern of the carbon-supported PtZn intermetallic compound electrocatalyst prepared in examples 1 and 8 and the carbon-supported Pt electrocatalyst prepared in comparative example 2.
FIG. 3A is a Transmission Electron Microscopic (TEM) spectrum of a carbon-supported PtZn electrocatalyst before heat treatment prepared in example 1 (A) and example 7 (B) and a carbon-supported Pt electrocatalyst before heat treatment prepared in comparative example 2 (C).
FIG. 4 is an oxygen reduction polarization curve of the carbon-supported PtZn intermetallic compound electrocatalyst prepared in example 1 and the commercial carbon-supported Pt electrocatalyst of comparative example 1 in an oxygen-saturated 0.1M perchloric acid electrolyte.
FIG. 5 is a cyclic voltammogram of the carbon-supported PtZn intermetallic catalyst prepared in example 1 and the commercial carbon-supported Pt electrocatalyst of comparative example 1 in a nitrogen-saturated 0.1M perchloric acid electrolyte.
The specific embodiment is as follows:
the invention is further described below in conjunction with specific examples which will enable a person skilled in the relevant art to better understand the invention. Of course, the invention is not limited to these specific embodiments.
Example 1:
a preparation method of a size-controllable carbon-supported PtZn intermetallic compound electrocatalyst comprises the following steps:
(1) A solution of chloroplatinic acid/ethylene glycol of 3.7mg/mL and a solution of zinc nitrate/ethylene glycol of 10mg/mL were prepared and 5.390mL of platinum salt solution and 1.337mL of zinc salt solution were removed, respectively, in a round bottom flask.
(2) 98mg of NaOH is weighed and dissolved in 20mL of glycol solution, then the mixture is transferred to the round-bottomed flask, and the mixture is subjected to ultrasonic treatment for 30 minutes to uniformly mix the solution; 80mg of amorphous carbon powder is weighed and dispersed in 30mL of ethylene glycol, and then the mixture is transferred to a round-bottom flask, and ultrasonic treatment is carried out for 3 hours to obtain slurry which is uniformly dispersed;
(3) Placing the round bottom flask in an oil bath, and continuously heating at 130 ℃ for 3 hours with magnetic stirring; then cooling to 60 ℃, adding 50mL of ultrapure water, and continuing stirring at the constant temperature of 60 ℃ for 3 hours; then washing and filtering with ultrapure water, vacuum drying at 80 ℃, collecting a sample and grinding to obtain solid powder.
(4) The solid powder was placed in a tube furnace at 10% H 2 And (3) heating to 600 ℃ at a heating rate of 5 ℃/min in Ar atmosphere, keeping the temperature for 2 hours, and naturally cooling to room temperature to obtain the target product.
XRD confirmed that the crystal structure of the product is L1 0 PtZn. The catalyst particle size was 6.3nm and the catalyst order was 82%.
Catalyst grain size calculation:
Figure BDA0003401981490000041
where d is the grain size (nm) and represents the average thickness of the grains in a direction perpendicular to the (hkl) crystal plane. Lambda is the wavelength of the incident X-rays (here 1.54056). 0 is the incident angle of the X-ray to the crystal plane. B is the half-height width of diffraction peak of the actual measurement sample, and is converted into radian (rad) in the calculation process through double-line correction and instrument factor correction
Catalyst order calculation:
Figure BDA0003401981490000042
I 110 is the intensity of the diffraction peak of the (110) crystal face, I 111 The intensity of the diffraction peak of the (111) crystal face.
Example 2:
the same procedure as in example 1 was followed except that the heating time in step (4) was 1 hour.
XRD confirmed that the crystal structure of the product is L1 0 PtZn. The catalyst grain size was 5.5nm and the degree of order was 66%.
Example 3:
the same procedure as in example 1 was followed except that the heating temperature in step (4) was 500 ℃.
XRD confirmed that the crystal structure of the product is L1 0 PtZn. The catalyst grain size was 5.4nm and the degree of order was 64%.
Example 4:
the same procedure as in example 1 was followed except that the heating temperature in step (4) was 500℃and the heating time was 1 hour.
XRD confirmed that the crystal structure of the product is L1 0 PtZn. The catalyst grain size was 4.8nm and the degree of order was 54%.
Example 5:
the same procedure as in example 1 was followed except that the heating temperature in step (4) was 700℃and the heating time was 1 hour.
XRD confirmed that the crystal structure of the product is L1 0 PtZn. The catalyst grain size was 9.1nm and the degree of order was 72%.
Example 6:
the same procedure as in example 1 was followed except that 8.085mL of the platinum salt and 2.005mL of the zinc salt were removed in step (1).
XRD confirmed that the crystal structure of the product is L1 0 PtZn. The catalyst grain size was 6.8nm and the degree of order was 74%.
Example 7:
(1) A solution of chloroplatinic acid/ethylene glycol of 3.7mg/mL, a solution of zinc nitrate/ethylene glycol of 10mg/mL was prepared and 5.390mL of platinum salt solution and 13.370mL of zinc salt solution were removed in round bottom flasks, respectively.
(2) 97mg of NaOH is weighed and dissolved in 20mL of glycol solution, then the mixture is transferred to the round-bottomed flask, and the mixture is subjected to ultrasonic treatment for 30 minutes, so that the solution is uniformly mixed; 80mg of amorphous carbon powder is weighed and dispersed in 30mL of ethylene glycol, and then the mixture is transferred to a round-bottom flask, and ultrasonic treatment is carried out for 3 hours to obtain slurry which is uniformly dispersed;
(3) Placing the round bottom flask in an oil bath, and continuously heating at 130 ℃ for 3 hours with magnetic stirring; then cooling to 60 ℃, adding 50mL of ultrapure water, and continuing stirring at the constant temperature of 60 ℃ for 3 hours; then washing and filtering with ultrapure water, vacuum drying at 80 ℃, collecting a sample and grinding to obtain solid powder.
(4) The solid powder was placed in a tube furnace at 10% H 2 And heating to 600 ℃ at a heating rate of 5 ℃/min in Ar atmosphere, keeping the temperature for 2 hours, and naturally cooling to room temperature to obtain solid powder.
(5) The powder is placed in 100mL of 0.1M perchloric acid solution, stirred for 6 hours at normal temperature, filtered and dried in vacuum at 80 ℃ to obtain the target product.
Example 8:
the same procedure as in example 3 was followed except that 26.740mL of zinc salt was removed in step (1).
XRD confirmed that the crystal structure of the product is L1 0 PtZn. The catalyst grain size was 4.6nm and the degree of order was 68%.
Comparative example 1:
the carbon supported platinum catalyst was a commercial Pt/C (platinum mass fraction of 20 wt%) from Johnson Mattey, UK.
Comparative example 2:
the preparation method is the same as in example 1, and the zinc salt is not added in the step (1) to prepare the platinum carbon catalyst. XRD confirms that the product is a face-centered cubic carbon supported platinum catalyst, and the obtained material has low oxygen reduction activity.
Example 9:
electrochemical performance test method
3mg of the catalysts prepared in examples and comparative examples were added to a mixed solution of 2.9mL of absolute ethanol and 0.1mL of LNationg (mass fraction: 5 wt%) respectively. And (3) performing ultrasonic dispersion for at least 30 minutes to obtain uniformly mixed ink, uniformly coating 10 mu L of the prepared ink on the glassy carbon rotary disk electrode by using a liquid-transfering gun, and then volatilizing the solvent. The electrode is used as a working electrode, a platinum wire is used as a counter electrode, and a saturated calomel electrode is used as a reference electrode. The catalyst is firstly scanned for 20 circles in a potential interval of 0.05-1.2V (relative to a reversible hydrogen electrode) in a 0.1M perchloric acid solution of saturated nitrogen at a scanning speed of 50mV/s so as to achieve the aim of activating the catalyst. The cyclic voltammograms of the different catalysts at circle 20 were recorded separately. Then scanning in 0.1M perchloric acid solution saturated by oxygen at a scanning speed of 10mV/s and a rotating speed of 1600rpm in a potential interval of 0-1.2V to obtain linear scanning voltammograms of different catalysts.
As can be seen from FIG. 1, the alloy particle structure of the carbon-supported PtZn intermetallic compound electrocatalyst prepared by the invention is consistent, and is L1 0 PtZn intermetallic compound, and as the heat treatment temperature increases, the particle size gradually increases.
As can be seen from fig. 2, the carbon-supported PtZn intermetallic compound electrocatalyst particle size decreased with increasing Zn salt content in the feed; meanwhile, with the introduction of Zn element, the lattice constant is obviously changed.
As can be seen from FIG. 3, the alloy particles of the carbon-supported PtZn intermetallic compound electrocatalyst prepared by the invention are uniformly distributed, and no obvious agglomeration phenomenon exists.
As can be seen from fig. 4, the electrocatalyst prepared by the method introduces the alloy element Zn, so that the catalytic activity of the electrocatalyst is remarkably improved, and the mass specific activity of the electrocatalyst is superior to that of a commercial Pt/C catalyst.
As can be seen from FIG. 5, the area specific activity of the electrocatalyst prepared by the invention is obviously superior to that of a commercial Pt/C catalyst, and has potential application value.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention, and not for limiting the same; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the invention.

Claims (10)

1. The size-controllable carbon-supported PtZn intermetallic compound electrocatalyst is characterized in that the structure of the electrocatalyst is a face-centered tetragonal structure, ptZn alloy is highly ordered, and Pt and Zn are alternately arranged according to atomic layers.
2. The carbon-supported PtZn intermetallic compound electrocatalyst according to claim 1 wherein the atomic proportion of Zn in the electrocatalyst is 40 to 60% of the total metal M.
3. The method for producing a carbon-supported PtZn intermetallic compound electrocatalyst according to claim 1 or 2, characterized by comprising mainly the steps of:
(1) Respectively transferring a certain amount of platinum ion/organic solvent precursor solution and zinc ion/organic solvent precursor solution into a reaction container, then adding alkali liquor dissolved in the organic solvent, controlling pH to be more than 13, uniformly dispersing, adding amorphous carbon powder dispersion liquid dispersed in the organic solvent, and continuously uniformly dispersing to obtain slurry;
(2) Stirring and preserving heat for 2-5 hours at the temperature of 110-130 ℃, cooling to 60-80 ℃, adding a proper amount of deionized water, continuously stirring and preserving heat for 2-5 hours, washing with water, filtering, drying, and grinding to obtain solid powder;
(3) And (3) carrying out heat treatment on the solid powder obtained in the step (2) for 1-4 hours at 500-700 ℃ in a hydrogen/inert gas atmosphere to obtain the carbon-supported PtZn intermetallic compound electrocatalyst, or carrying out acid washing after heat treatment to obtain the carbon-supported PtZn intermetallic compound electrocatalyst.
4. A process according to claim 3, wherein the organic solvent in step (1) comprises ethylene glycol; the source of the platinum ion is selected from one or more of platinum chlorate, potassium chloroplatinate and potassium chloroplatinite; the zinc ion source is selected from one or more than two of zinc nitrate, zinc chloride and zinc sulfate; the alkaline component in the alkali liquor is NaOH or KOH.
5. The method according to claim 3, wherein the molar ratio of zinc ions/platinum ions in step (1) is 2:1 to 20:1; the pH value of the slurry is controlled to be 13-14, and the final concentration of platinum ions is 0.1-20 mM; the mass ratio of the total mass of zinc ions and platinum ions to amorphous carbon powder is 1:100-1:2.
6. The method according to claim 3, wherein the pH of the slurry is controlled to 7 to 9 after the completion of the stirring and the heat preservation in the step (2).
7. The preparation method according to claim 3, wherein the heat treatment in the step (3) is performed in a tube furnace, the heating rate is controlled to be 1-5 ℃/min, and the cooling rate is controlled to be 1-2 ℃/min; inert gases include nitrogen, argon, helium, and neon.
8. The method of claim 3, wherein the heat treatment in step (3) is performed by: and (3) under the reducing atmosphere of hydrogen/argon with the volume ratio of 10:90, the solid powder obtained in the step (2) is heated to 500-700 ℃ at the speed of 5 ℃/min, kept for 1-4 hours, and naturally cooled to room temperature.
9. Use of the carbon-supported PtZn intermetallic compound electrocatalyst according to claim 1 or 2 in an oxidation-reduction reaction in an acidic environment.
10. The use according to claim 9, wherein said use comprises use in proton exchange membrane fuel cells, high temperature phosphoric acid fuel cells.
CN202111502729.5A 2021-12-09 2021-12-09 Size-controllable carbon-supported PtZn intermetallic compound electrocatalyst, and preparation method and application thereof Pending CN116259769A (en)

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