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Preparation method of fuel cell platinum-based alloy catalyst

A platinum-based alloy and fuel cell technology, applied in battery electrodes, circuits, electrical components, etc., can solve the problems of poor stability of precursor solution, unfavorable rapid production, long heating time, etc., to facilitate rapid production and improve catalytic performance , the effect of strong versatility

Active Publication Date: 2021-11-16
NANJING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the preparation process of this method will produce some precipitation, and the stability of the precursor solution is poor.
The heating time is long and the steps are cumbersome, which is not conducive to rapid production

Method used

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  • Preparation method of fuel cell platinum-based alloy catalyst
  • Preparation method of fuel cell platinum-based alloy catalyst
  • Preparation method of fuel cell platinum-based alloy catalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Add 0.4g of cobalt acetate tetrahydrate to 50mL of ethanol, stir until dissolved, add 3mL of concentrated ammonia solution with a mass fraction of 28%, and stir in the air until the color of the solution turns dark brown, then transfer the solution to a microwave oven. In the reactor, heat with a heating power of 500W for 30min, mix the obtained precursor with 200mg of commercial platinum carbon with a platinum mass loading of 20%, and anneal at 200°C for 4h after heating and drying, and the annealing atmosphere is H 2 / Ar, the hydrogen mass fraction is 5%.

Embodiment 2

[0034] Add 0.4g of cobalt acetate tetrahydrate to 50mL of ethanol, stir until dissolved, add 3mL of concentrated ammonia solution with a mass fraction of 28%, and stir in the air until the color of the solution turns dark brown, then transfer the solution to a microwave oven. In the reactor, heat with a heating power of 500W for 30min, mix the obtained precursor with 200mg of commercial platinum carbon with a platinum mass loading of 20%, and anneal at 400°C for 4h after heating and drying, and the annealing atmosphere is H 2 / Ar, the hydrogen mass fraction is 5%.

Embodiment 3

[0036] Add 0.4g of cobalt acetate tetrahydrate to 50mL of ethanol, stir until dissolved, add 3mL of concentrated ammonia solution with a mass fraction of 28%, and stir in the air until the color of the solution turns dark brown, then transfer the solution to a microwave oven. In the reactor, heat with a heating power of 500W for 30min, mix the obtained precursor with 200mg of commercial platinum carbon with a platinum mass loading of 20%, and anneal at 600°C for 4h after heating and drying, and the annealing atmosphere is H 2 / Ar, the hydrogen mass fraction is 5%.

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Abstract

The invention discloses a fuel cell platinum-based alloy catalyst preparation method, and the method comprises: (1) dissolving a metal salt at least containing a cobalt salt, and adding ammonia water or a small molecule containing an amino group and an alkali to form a sol; (2) carrying out microwave heating on the sol; (3) mixing the heated sol with a platinum-containing catalyst, carrying out drying, carrying out annealing treatment, and carrying out acid pickling and drying to obtain the platinum alloy catalyst. The method disclosed by the invention has the characteristics of rapidness, simplicity and convenience in preparation, and is convenient for batch and large-scale production. Meanwhile, the platinum-cobalt alloy catalyst prepared by the method is uniform in particle size, high in catalytic performance and suitable for an oxygen reduction reaction catalyst in a fuel cell.

Description

technical field [0001] The invention relates to a method for preparing an alloy catalyst, in particular to a method for preparing a platinum-based alloy catalyst for a fuel cell. Background technique [0002] Hydrogen energy technology is one of the key technologies for carbon reduction, and it is also the key to competition in a new round of technological revolution and industrial transformation. As the core technology of the hydrogen energy industry, fuel cell technology, especially the proton exchange membrane fuel cell, is widely used in the fields of transportation, power supply and portable power supply, and is generally considered to be one of the key technologies to solve the future human energy crisis. However, the catalyst is still based on platinum. In order to further reduce costs and reduce the amount of platinum catalysts, Pt and other transition metals, such as Fe, Co, Ni and other transition metal elements, are usually alloyed to improve catalyst performance...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/92B82Y40/00
CPCH01M4/921H01M4/926B82Y40/00Y02E60/50
Inventor 刘建国李晓克李佳曹峰段骁
Owner NANJING UNIV
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