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Anti-antipolar catalyst for fuel cell and preparation method and application of anti-antipolar catalyst

A fuel cell and catalyst technology, applied in battery electrodes, circuits, electrical components, etc., can solve the problems of poor material durability, large catalyst size, and easy agglomeration, and achieve the effects of increasing difficulty, reducing residual volume, and reducing adverse effects

Pending Publication Date: 2021-12-31
CHINA AUTOMOTIVE INNOVATION CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It uses iridium or ruthenium as a catalyst, but when it uses ruthenium, the durability of the material is poor, and when iridium is used, it is easy to agglomerate, resulting in a large catalyst size and low utilization
[0007] The above-mentioned scheme has the problems of poor safety, poor durability or low utilization rate. Therefore, it is very necessary to develop a fuel cell anti-anti-electrode catalyst with high safety, good durability and high utilization rate.

Method used

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  • Anti-antipolar catalyst for fuel cell and preparation method and application of anti-antipolar catalyst

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Embodiment 1

[0038] This embodiment provides a fuel cell anti-reversed catalyst, the preparation method of the catalyst is as follows:

[0039] (1) Dissolve 10mg of chloroiridic acid and 70mg of polyvinylpyrrolidone in sodium hydroxide solution, keep stirring until the solution is clear while ensuring pH = 13-14, heat up to 80°C while continuing to stir until the solvent is almost completely removed ;

[0040] (2) Transfer the solvent-removed mixture to a muffle furnace, heat-treat at 500° C. for 1 h and cool to room temperature, then wash in a hydroalcoholic solution to obtain a fuel cell anti-reverse catalyst;

[0041] The SEM figure of described catalyst is as figure 1 shown by figure 1 It can be seen that the present invention prevents the catalyst particles from agglomerating and growing up well by adding a surfactant as a stabilizer, so that the final catalyst particle size is smaller, and at the same time, the surface is removed by high-temperature heat treatment and a combination...

Embodiment 2

[0043] This embodiment provides a fuel cell anti-reversed catalyst, the preparation method of the catalyst is as follows:

[0044] (1) Dissolve 10 mg of iridic acid acetate and 75 mg of polyvinylpyrrolidone in an alkaline solution, keep stirring until the solution is clear and ensure pH = 13-14, and heat up to 75° C. while continuing to stir until the solvent is almost completely removed;

[0045] (2) The solvent-removed mixture was transferred to a muffle furnace, heat-treated at 400° C. for 1 h, cooled to room temperature, and then washed in a hydroalcoholic solution to obtain a fuel cell anti-reverse catalyst.

Embodiment 3

[0047]This embodiment provides a fuel cell anti-reversed catalyst, the preparation method of the catalyst is as follows:

[0048] (1) Dissolve 10 mg of chloroiridic acid and 70 mg of sodium lauryl sulfate in sodium hydroxide solution, continue to stir until the solution is clear and ensure pH = 13-14, and heat up to 80 ° C while continuing to stir until the solvent almost completely removed;

[0049] (2) The solvent-removed mixture was transferred to a muffle furnace, heat-treated at 400° C. for 1 h, cooled to room temperature, and then washed in a hydroalcoholic solution to obtain a fuel cell anti-reverse catalyst.

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Abstract

The invention provides a fuel cell antipolar catalyst and a preparation method and application thereof. The preparation method comprises the following steps: (1) mixing an iridium precursor, a surfactant and an alkali liquor to obtain a mixed liquor, and stirring to volatilize a solvent; (2) carrying out heat treatment on the mixture without the solvent, and carrying out washing to obtain the anti-reverse-pole catalyst for the fuel cell. Compared with a traditional air direct pyrolysis method, the method for converting the iridium precursor into the hydroxide and converting the hydroxide into the oxide through high-temperature pyrolysis and dehydration does not need to add an additional oxidizing agent to accelerate the oxidation rate, and the prepared catalyst has smaller initial potential and overpotential (10mAcm <-2>); therefore, the catalyst has better catalytic oxygen evolution capability and antipolar resistance.

Description

technical field [0001] The invention belongs to the field of fuel cell catalysts, and relates to a fuel cell anti-reverse catalyst, a preparation method and application thereof. Background technique [0002] Proton exchange membrane fuel cell (PEMFC), as one of the most anticipated clean energy sources, converts chemical energy into electrical energy through a simple chemical reaction. Compared with other energy sources, it has high conversion efficiency, high power density, and low temperature operation. And "zero emission" and other characteristics, it has broad application prospects in power vehicles, small and medium-sized power stations, communication base stations, etc. [0003] When PEMFC is used as the power source of electric vehicles, in addition to normal working conditions, it also needs to face various complex working conditions. prone to anode fuel is hydrogen (H 2 ) is undersupplied, resulting in H 2 The generated protons and electrons are not enough to mee...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/90
CPCH01M4/90H01M4/9025Y02E60/50
Inventor 刘冬安张运搏苏金权程晓草苏建敏
Owner CHINA AUTOMOTIVE INNOVATION CORP
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