CN107815699B - A kind of POMs-C composite material, preparation method and application - Google Patents
A kind of POMs-C composite material, preparation method and application Download PDFInfo
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- CN107815699B CN107815699B CN201711101326.3A CN201711101326A CN107815699B CN 107815699 B CN107815699 B CN 107815699B CN 201711101326 A CN201711101326 A CN 201711101326A CN 107815699 B CN107815699 B CN 107815699B
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- 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
- C25B1/00—Electrolytic production of inorganic compounds or non-metals
- C25B1/01—Products
- C25B1/02—Hydrogen or oxygen
- C25B1/04—Hydrogen or oxygen by electrolysis of water
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- 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
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- C25B11/055—Electrodes formed of electrocatalysts on a substrate or carrier characterised by the substrate or carrier material
- 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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- C25B11/00—Electrodes; Manufacture thereof not otherwise provided for
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- 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
- C25B11/091—Electrodes formed of electrocatalysts on a substrate or carrier characterised by the electrocatalyst material consisting of at least one catalytic element and at least one catalytic compound; consisting of two or more catalytic elements or catalytic compounds
- C25B11/095—Electrodes formed of electrocatalysts on a substrate or carrier characterised by the electrocatalyst material consisting of at least one catalytic element and at least one catalytic compound; consisting of two or more catalytic elements or catalytic compounds at least one of the compounds being organic
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- 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
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Abstract
The invention discloses a kind of POMs-C composite materials, preparation method and application.POMs-C composite material of the invention the preparation method is as follows: weigh Fe-Anderson polyacid parent first, deionized water is added and stirs to dissolution, adds Tris-NH2Reaction system is placed at room temperature by heating reaction after reaction, and TBAB stirring is added, has solid precipitation, finally filters, and obtains the asymmetric heteropoly acid POMs of unilateral modification；Then the asymmetric heteropoly acid POMs by unilateral side modification is uniformly mixed with pressure resin-oatmeal, is added pressure-cure agent, is placed to dry at room temperature, calcine under last inert atmosphere, POMs-C composite material is prepared.Preparation method of the invention is simple, and cost of material is lower；Obtained composite material liberation of hydrogen works well, and is expected to open up a new visual angle in the design of electrocatalytic hydrogen evolution material.
Description
Technical field
The present invention relates to hydrogen energy source technical fields, specifically, are related to a kind of POMs-C composite material, preparation method and answer
With.
Background technique
The energy and environment are the main problems that human social is related to.The energy requirement in the whole world 80% at present
From fossil fuel, this will finally lead to the exhaustion of fossil fuel, and its use also leads to serious environmental pollution.From
It is the inexorable trend developed that fossil fuel, which is gradually turned to using the free of contamination non-fossil energy of sustainable development,.Hydrogen is ideal clear
One of clean energy is also the industrial chemicals of weight, is widely paid attention to by countries in the world.Water electrolysis hydrogen production is to realize industrialize, is cheap
Prepare the important means of hydrogen.Water electrolysis hydrogen production has many advantages, such as that easy, pollution is small, product purity is high, but its liberation of hydrogen is anti-
Answer (2H++2e→H2Or 2H2O+2e→H2+2OH-) there are more serious cathodic polarizations, lead to higher hydrogen manufacturing cost, be not suitable for
Large-scale application.Electrocatalytic hydrogen evolution (the Electrocatalytic Hydrogen Evolution that developed recently gets up
Reaction, HER) be considered as great application prospect green hydrogen producing technology.This hydrogen producing technology under the effect of the catalyst,
Overpotential of hydrogen evolution can be greatly lowered, with low energy consumption, high-efficient, advantages of environment protection.Based on noble metals such as Pt, Pd
It is low that catalyst not only originates overpotential, but also activity and stability are all fine, are the best catalyst of current Hydrogen Evolution Performance.But
These noble metals are expensive, are unfavorable for practical application.
Base metal liberation of hydrogen catalyst mainly have phosphide based on transition metal such as Mo, W, Fe, Co, Ni, sulfide with
And their alloy etc..Since the content (about 0.00011%) of Mo and W in the earth's crust is far below Fe (6.8%), Co
(0.003%), therefore the content of Ni (0.0089%) develops the electrocatalytic hydrogen evolution catalyst based on Fe, Co, Ni and is more advantageous to
The extensive industrialization of electrocatalytic hydrogen evolution technology.In recent years the electrocatalytic hydrogen evolution catalyst based on Fe, Co, Ni has obtained sending out energetically
Exhibition, is prepared for the catalyst much haveing excellent performance, plays good impetus to electrocatalytic hydrogen evolution technological industrialization.This
A little catalyst mainly include alloy, phosphide, sulfide of Fe, Co, Ni etc.,
R.B.Levy has been found that carbide possesses the catalytic property of similar Pt with M.Boudart, this is primarily due to it
There is the d having electronic state of similar Pt, based on this discovery, also (alcohol decomposes and activation from heterogeneous catalysis for the application range of tungsten carbide
Oxygen) expand to fuel cell electrolysis, electrolyzer etc..The special construction of carbide determines that it possesses good property on HER
Can, therefore, also just gradually it is applied to these new fields by the catalyst of matrix of carbide.
Summary of the invention
The purpose of the present invention is to provide a kind of preparation method is simple, cost of material is lower, and liberation of hydrogen works well novel
POMs-C composite material, preparation method and application.
In order to solve the above-mentioned technical problem, the invention adopts the following technical scheme:
The present invention provides a kind of preparation method of POMs-C composite material, comprising the following steps:
(1) the asymmetric heteropoly acid POMs of the unilateral modification of preparation: Fe-Anderson polyacid parent is weighed, deionization is added
Water is stirred to dissolution, adds Tris-NH2Reaction system is placed at room temperature after reaction, TBAB is added by heating reaction
Stirring, has solid precipitation, finally filters, and obtains the asymmetric heteropoly acid POMs of unilateral modification；
(2) POMs-C composite material is prepared: the asymmetric heteropoly acid POMs and pressure for the unilateral modification that step (1) is obtained
Resin-oatmeal mixes in proportion, and adds pressure-cure agent, is placed to dry at room temperature；Finally calcine under an inert atmosphere,
Obtain POMs-C composite material.
In the present invention, in step (1), heating reaction temperature is 70 DEG C~100 DEG C.
In the present invention, in step (1), purification uses means re-crystallization, and the solvent of recrystallization is distilled water.
In the present invention, in step (1), Fe-Anderson polyacid parent and Tris-NH2Molar ratio be 1:1.3~1:
1.6。
In the present invention, in step (2), pressure resin-oatmeal is polyvinyl butyral；Pressure-cure agent is para hydroxybenzene sulphur
Acid.
In the present invention, in step (2), asymmetric heteropoly acid POMs, pressure resin-oatmeal and the pressure-cure agent of unilateral side modification
Mass ratio be 1:(0.5~30): (0.4~24).
In the present invention, in step (2), asymmetric heteropoly acid POMs, pressure resin-oatmeal and the pressure-cure agent of unilateral side modification
Mass ratio be 1:(1~15): (1~15).
The present invention also provides a kind of POMs-C composite materials that above-mentioned preparation method obtains.
The present invention further provides a kind of application of above-mentioned POMs-C composite material in electrocatalytic hydrogen evolution reaction.
Electrocatalytic hydrogen evolution performance test is carried out using the method included the following steps in the present invention:
(1) match 0.2~0.5wt% of Nation solution, it is prepared in 100 μ L to weigh the dissolution of 1mgPOMs-C composite material
It is evenly dispersed uniform under ultrasound in Nation solution.Then the solution is drawn into 6~24 μ L on glass-carbon electrode again, it is natural
It dries；
(2) electrolyte of the KOH aqueous solution of 1M as electro-catalysis is prepared, inert gas is passed through and throws out air, with the KOH of 1M
Glass-carbon electrode, Ag/AgCl electrode, platinum electrode are then connected electrochemical operation by the electrode surface of aqueous cleaning glass-carbon electrode
It stands, the performance of composite material electrocatalytic hydrogen evolution is measured in alkaline solution.
The present invention compared with the existing technology, has the advantages that
(1) it is put forward for the first time organic material and high molecular material combines and prepares electrocatalytic hydrogen evolution material, being expected to can be in electro-catalysis
A new visual angle is opened up in the design of liberation of hydrogen material.
(2) present invention prepares electrocatalytic hydrogen evolution composite material with elements such as earth abundance wide Fe, Mo, C, is expected to realize work
Industry metaplasia produces.
(3) in the present invention, using the POMs of excellent dissymmetrical structure as the composite material of carbon, electrocatalytic hydrogen evolution is improved
When liberation of hydrogen effect.
Detailed description of the invention
Fig. 1: being (a) polarization curve that Application Example 1 obtains POMs-C composite material, is (b) Application Example 1
The Tafel slope figure of the POMs-C composite material arrived.
Fig. 2: being (a) polarization curve that Application Example 2 obtains POMs-C composite material, is (b) Application Example 2
The Tafel slope figure of the POMs-C composite material arrived.
Fig. 3: being (a) polarization curve that Application Example 3 obtains POMs-C composite material, is (b) Application Example 3
The Tafel slope figure of the POMs-C composite material arrived.
The infrared spectrum of Fig. 4: Fe-Anderson type polyacid parent.
Fig. 5: the infrared spectrum of the Fe-Anderson type polyacid for the Tris derivative unilateral side modification that embodiment 1 is prepared.
Specific embodiment
Technical solution of the present invention is further described below with reference to specific embodiment, but the present invention is not limited to
Following embodiments.
Various raw materials used in various embodiments of the present invention are unless otherwise specified commercially available.
In embodiment, (NH4)3[FeMo6O24H6] preparation method see that " Ma Ji, Zhou Baibin, Ma Huiyuan wait .Anderson
The synthesis and structure of structural iron molybdenum heteropolyacid rare-earth salts characterizes molecular science journal, 2004,20 (3): 28 ", infrared spectrogram
As shown in Figure 4.
Embodiment 1
Weigh 3.0515g (2mmol) (NH4)3[FeMo6O24H6]·25H2O is added 20mL deionized water and stirs to dissolution,
It is slowly added to 0.36g (3.0mmol) Tris-NH2, 100 DEG C are heated to, after reacting 12h, reaction system is placed at room temperature, is added
Enter 1.986gTBAB, stir 1h, there is white solid precipitation, filters.Weigh the Fe- of the Tris derivative unilateral side modification prepared
Anderson type heteropoly acid 17mg (Fig. 5 is its infrared spectrum).In the polyvinyl butyral and 200mg that 200mg is wherein added
P-hydroxybenzenyl sulfonate, stir evenly at room temperature place 12h dry, then pass to N2, 3h is calcined at 600 DEG C, is obtained
POMs-C composite material.
Application Example 1
The sample of embodiment 1 is ground, glassy carbon electrode surface is clean using 0.05 μm of alumina lap, it removes
Residual sample is rinsed well using second alcohol and water, is dried.
(1) match Nation solution 0.5wt% with anhydrous methanol.It weighs the above-mentioned hybrid catalyst of 1mg and is dissolved in 100 μ L preparation
In good Nation solution, evenly dispersed two hours under ultrasound.Then the solution is drawn into 18 μ L on glass-carbon electrode again,
Naturally dry.
(2) electrolyte of the KOH aqueous solution of 1M as electro-catalysis is prepared, nitrogen is passed through and throws out air, it is water-soluble with the KOH of 1M
Liquid cleans the electrode surface of glass-carbon electrode, and glass-carbon electrode, Ag/AgCl electrode, platinum electrode are then connected electrochemical workstation,
The performance of the electrode material electrocatalytic hydrogen evolution is measured in alkaline solution, which is 1mA cm in current density-2Overpotential be
352mV (as shown in Figure 1a), Tafel slope are 140mV dec-1(as shown in Figure 1 b).
Embodiment 2
Weigh 3.0515g (2mmol) (NH4)3[FeMo6O24H6]·25H2O is added 20mL deionized water and stirs to dissolution,
It is slowly added to 0.36g (3.0mmol) Tris-NH2, 90 DEG C are heated to, after reacting 12h, reaction system is placed at room temperature, is added
1.986gTBAB stirs 1h, there is white solid precipitation, filters.The heteropoly acid 17mg prepared is weighed, 100mg is added wherein
Polyvinyl butyral and 80mg p-hydroxybenzenyl sulfonate, stir evenly at room temperature place 10h dry, then pass to N2,
3h is calcined at 600 DEG C, obtains POMs-C composite material.
Application Example 2
The sample of embodiment 2 is ground, glassy carbon electrode surface is clean using 0.05 μm of alumina lap, it removes
Residual sample is rinsed well using second alcohol and water, is dried.
(1) match Nation solution 0.5wt% with anhydrous methanol.It weighs the above-mentioned hybrid catalyst of 1mg and is dissolved in 100 μ L preparation
In good Nation solution, evenly dispersed two hours under ultrasound.Then the solution is drawn into 12 μ L on glass-carbon electrode again,
Naturally dry.
(2) electrolyte of the KOH aqueous solution of 1M as electro-catalysis is prepared, nitrogen is passed through and throws out air, it is water-soluble with the KOH of 1M
Liquid cleans the electrode surface of glass-carbon electrode, and glass-carbon electrode, Ag/AgCl electrode, platinum electrode are then connected electrochemical workstation,
The performance of the electrode material electrocatalytic hydrogen evolution is measured in alkaline solution, which is 1mA cm in current density-2Overpotential be
432mV (as shown in Figure 2 a), Tafel slope are 116mV dec-1(as shown in Figure 2 b).
Embodiment 3
Weigh 3.0515g (2mmol) (NH4)3[FeMo6O24H6]·25H2O is added 20mL deionized water and stirs to dissolution,
It is slowly added to 0.36g (3.0mmol) Tris-NH2, 80 DEG C are heated to, after reacting 12h, reaction system is placed at room temperature, is added
1.986gTBAB stirs 1h, there is white solid precipitation, filters.The heteropoly acid 55mg prepared is weighed, is wherein being added 32mg's
The p-hydroxybenzenyl sulfonate of polyvinyl butyral and 24mg stirs evenly placement 12h at room temperature and dries, then passes to N2,
3h is calcined at 600 DEG C, obtains POMs-C composite material.
Application Example 3
The sample of embodiment 3 is ground, glassy carbon electrode surface is clean using 0.05 μm of alumina lap, it removes
Residual sample is rinsed well using second alcohol and water, is dried.
(1) match Nation solution 0.5wt% with anhydrous methanol.It weighs the above-mentioned hybrid catalyst of 1mg and is dissolved in 100 μ L preparation
In good Nation solution, evenly dispersed two hours under ultrasound.Then the solution is drawn into 24 μ L on glass-carbon electrode again,
Naturally dry.
(2) electrolyte of the KOH aqueous solution of 1M as electro-catalysis is prepared, nitrogen is passed through and throws out air, it is water-soluble with the KOH of 1M
Liquid cleans the electrode surface of glass-carbon electrode, and glass-carbon electrode, Ag/AgCl electrode, platinum electrode are then connected electrochemical workstation,
The performance of the electrode material electrocatalytic hydrogen evolution is measured in alkaline solution, which is 1mA cm in current density-2Overpotential be
348mV (as shown in Figure 3a), Tafel slope are 142mV dec-1(as shown in Figure 3b).
Claims (9)
1. a kind of preparation method of POMs-C composite material, which comprises the following steps:
(1) the asymmetric heteropoly acid POMs of the unilateral modification of preparation: Fe-Anderson polyacid parent is weighed, deionized water is added and stirs
It mixes to dissolution, adds Tris-NH2Reaction system is placed at room temperature by heating reaction after reaction, and TBAB stirring is added,
There is solid precipitation, finally filter, obtains the asymmetric heteropoly acid POMs of unilateral modification；
(2) POMs-C composite material is prepared: the asymmetric heteropoly acid POMs and pressure resin for the unilateral modification that step (1) is obtained
Powder mixes in proportion, and adds pressure-cure agent, is placed to dry at room temperature；It finally calcines, obtains under an inert atmosphere
POMs-C composite material.
2. preparation method as described in claim 1, which is characterized in that in step (1), heating reaction temperature is 70 DEG C~100
℃。
3. preparation method as described in claim 1, which is characterized in that in step (1), Fe-Anderson polyacid parent and
Tris-NH2Molar ratio be 1:1.3~1:1.6.
4. preparation method as described in claim 1, which is characterized in that in step (2), pressure resin-oatmeal is polyvinyl alcohol contracting fourth
Aldehyde；Pressure-cure agent is p-hydroxybenzenyl sulfonate.
5. preparation method as described in claim 1, which is characterized in that in step (2), the asymmetric heteropoly acid of unilateral side modification
The mass ratio of POMs, pressure resin-oatmeal and pressure-cure agent are 1:(0.5~30): (0.4~24).
6. preparation method as claimed in claim 1 or 5, which is characterized in that in step (2), the asymmetry of unilateral side modification is miscellaneous more
The mass ratio of sour POMs, pressure resin-oatmeal and pressure-cure agent are 1:(1~15): (1~15).
7. preparation method as described in claim 1, it is characterised in that: in step (2), place 8-14h at room temperature and dry；Calcining
Temperature is 580~620 DEG C, calcination time 1-3h.
8. a kind of POMs-C composite material that the preparation method as described in one of claim 1~7 obtains.
9. a kind of application of POMs-C composite material as claimed in claim 8 in electrocatalytic hydrogen evolution reaction.
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| WO2010107919A1 (en) * | 2009-03-17 | 2010-09-23 | Emory University | Polyoxometalate water oxidation catalysts and methods of use thereof |
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