Non-supported catalyst pulp, preparation method and application thereof

A catalyst slurry and supported technology, which is applied in the field of fuel cell and solid polymer water electrolysis cell catalyst slurry and its preparation, can solve the problems of no catalyst activity and great influence on catalyst activity, and achieve a simple and fast preparation process. , the effect of accelerating the hydrolysis rate

Inactive Publication Date: 2010-07-14
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The experimental results show that the different types of protective agents have a great influence on the catalyst activity, especially some protective age

Method used

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  • Non-supported catalyst pulp, preparation method and application thereof
  • Non-supported catalyst pulp, preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] Accurately weigh 400 mg of Nafion solution with a mass concentration of 5%, add it to the mixed solution of ethanol and water, the mass ratio of ethanol and water is 1:1, stir for 6 minutes, add 80 mg of Ir in H 2 IrCl 6 The solution continued to stir for 30 minutes, and NaOH was added to adjust the pH value of the solution to 13. The solution was transferred to a pressure-resistant stainless steel reactor. The temperature was 150° C., and the reaction time was 5 hours to finally obtain a colloidal solution of Ir nanoparticles modified by the proton-conducting polymer. The obtained colloidal solution adopts dialysis bag in the mixed solution of ethanol and water (wherein the mass fraction of ethanol and water is 95% and 5% respectively) and dialysis process removes organic by-product and impurity ion, and the cut-off molecular weight of dialysis bag is 14000Da , to obtain a catalyst slurry for preparing a battery catalyst layer, wherein the mass fraction of the metal c...

Embodiment 2

[0055] Accurately weigh 600 mg of Nafion solution with a mass concentration of 5%, add it to the mixed solution of ethanol and water, the mass ratio of ethanol and water is 1:1, after stirring for 6 minutes, add 80 mg of Ir in H 2 IrCl 6 and RuCl containing 20 mgRu 3 Continue to stir the solution for 30 minutes, add NaOH to adjust the pH value of the solution to 13.5, transfer the solution to a pressure-resistant stainless steel reactor, and rapidly raise the temperature to 160°C at an average heating rate of 15°C / min under airtight conditions to control the reaction The temperature was 160° C., and the reaction time was 5 hours to finally obtain a colloidal solution of IrRu nanoparticles modified by the proton-conducting polymer. The obtained colloidal solution adopts dialysis bag in the mixed solution of isopropanol alcohol and water (wherein the mass fraction of isopropanol and water are respectively 95% and 5%) and dialysis process removes organic by-product and impurity ...

Embodiment 3

[0059] Accurately weigh 600 mg of Nafion solution with a mass concentration of 5%, add it to the mixed solution of ethanol and water, the mass ratio of ethanol and water is 1:1, after stirring for 6 minutes, add 80 mg of Ir in H 2 IrCl 6 and Na containing 20mgSe 2 SeO 3 Continue to stir the solution for 30 minutes, add NaOH to adjust the pH value of the solution to 12.5, transfer the solution to a pressure-resistant stainless steel reactor, and rapidly raise the temperature to 150°C at an average heating rate of 15°C / min under airtight conditions to control the reaction The temperature is 150° C., and the reaction time is 5 hours to finally obtain a colloidal solution of IrSe nanoparticles modified by the proton-conducting polymer. The obtained colloidal solution adopts dialysis bag in the mixed solution of ethanol and water (wherein the mass fraction of ethanol and water is 96% and 4% respectively) and dialysis process removes organic by-product and impurity ion, and the cu...

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Abstract

The invention discloses a non-supported catalyst pulp, a preparation method and an application thereof, and metal nano particles are modified by proton-conducting polymers. The invention is characterized in that: 1) in the preparation process, polymers having the proton-conducting function are used as a protective agent; 2) only a small amount of proton-conducting polymers are added, and the mass ratio of the proton-conducting polymers to the metal catalyst is 0.02-1:1; 3) reactants are placed in a pressure-resistant stainless steel reaction kettle to react under the airtight condition at 90-200 DEG C for 2-24 hours to finally obtain the proton-conducting polymer in-situ modified metal nano particles, the average particle diameter of which is 1-2 nm; 4) after impurities are removed from the reaction product, no additional proton-conducting polymers need to be added or removed, and the reaction product can be directly used to prepare a fuel cell and the catalysis layer of a solid polymer water electrolyzer; and 5) the prepared catalyst is applicable to the fuel cell and the water electrolyzer, and achieves excellent performance.

Description

technical field [0001] The invention relates to a catalyst in the field of solid polymer electrolyte cells, in particular to a fuel cell and a solid polymer water electrolysis cell catalyst slurry with a proton-conducting function and a preparation method thereof. Background technique [0002] A fuel cell is a device that directly converts the chemical energy of hydrogen and oxygen into electrical energy through an electrode reaction. The biggest feature of this device is that no combustion is involved in the reaction process, and its energy conversion efficiency is not limited by the "Carnot cycle", so its energy conversion rate is as high as 60%-80%, and the actual use efficiency is 2 times that of ordinary internal combustion engines. -3 times. In addition, it also has the advantages of diversified fuels, low noise, and little environmental pollution. [0003] The main feature of solid polymer water electrolysis technology is that solid polymer electrolyte (SPE) replace...

Claims

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Application Information

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IPC IPC(8): B01J31/06B01J23/56H01M4/88H01M4/92
CPCY02E60/50
Inventor 张华民张益宁张宇
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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