Preparation process of catalyst for proton exchange membrane fuel cell

A proton exchange membrane and fuel cell technology, applied in battery electrodes, nanotechnology for materials and surface science, circuits, etc., can solve the problems of fine separation of unfavorable impurity elements, poor loading effect of metal platinum, single activated carbon, etc. Achieve the effects of improving effective utilization, improving load uniformity, and high dispersion

Pending Publication Date: 2020-01-03
先进储能材料国家工程研究中心有限责任公司
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Problems solved by technology

[0005] The traditional method of preparing catalysts for proton exchange membrane fuel cells generally adopts a single activation method to activate activated carbon, which makes the activation degree of activated carbon insufficient, resulting in poor loading effect of metal platinum.
Secondly, the purification ...

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] A kind of preparation technology of catalyst for proton exchange membrane fuel cell is carried out according to the following steps:

[0027] (a) Immerse the activated carbon powder in the acid mixture solution formed by mixing concentrated nitric acid and concentrated hydrochloric acid, then place it in a constant temperature water bath with a temperature of 60 °C and a condensing reflux pipe for 4 hours, and then wash the treated material , filter to obtain the activated carbon filter cake; the activated carbon filter cake is placed in a ball mill for ball milling, the speed of the ball mill is controlled to be 200r / min, and the ball milling time is controlled to be 10min to obtain the activated carbon fine powder; the activated carbon fine powder is placed in a continuous Into a vacuum tube furnace with hydrogen and argon mixed gas, first keep warm at 300°C for 1h, then keep warm at 500°C for 4h, the volume ratio of hydrogen and argon is 1:2, and then cool to room tem...

Embodiment 2

[0033] A kind of preparation technology of catalyst for proton exchange membrane fuel cell, its step is basically the same as the step of the preparation technology of catalyst for proton exchange membrane fuel cell in embodiment 1, and its difference is:

[0034] 1. In step (a), the acid mixed solution is formed by mixing concentrated nitric acid and hydrogen peroxide, the temperature of the constant temperature water bath is controlled at 80°C, and the stirring treatment time is 6h; the activated carbon filter cake is placed in a ball mill for ball milling, and the speed of the ball mill is The control is 600r / min, and the ball milling time is controlled at 5min; the volume ratio of hydrogen to argon in the mixed gas of hydrogen and argon is 1:5, and the vacuum tube furnace is first kept at 200°C for 2h, and then kept at 600°C 5h;

[0035] 2. In step (b), the organic solvent in the mixed solution of organic solvent and deionized water is isopropanol, the volume ratio of isop...

Embodiment 3

[0040] A kind of preparation technology of catalyst for proton exchange membrane fuel cell, its step is basically the same as the step of the preparation technology of catalyst for proton exchange membrane fuel cell in embodiment 1, and its difference is:

[0041] 1. In step (a), the acid mixed solution is formed by mixing concentrated nitric acid, concentrated hydrochloric acid and hydrogen peroxide, the temperature of the constant temperature water bath is controlled at 70°C, and the stirring treatment time is 10h; the activated carbon filter cake is placed in a ball mill for ball milling, The speed of the ball mill is controlled at 400r / min, and the ball milling time is controlled at 8min; the volume ratio of hydrogen to argon in the mixed gas of hydrogen and argon is 1:3. Keep warm at ℃ for 4h;

[0042] 2. In step (b), the organic solvent in the mixed solution of organic solvent and deionized water is ethanol, and the volume ratio of ethanol to deionized water is 1:3, and ...

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Abstract

The invention provides a preparation process of a catalyst for a proton exchange membrane fuel cell. The catalyst for the proton exchange membrane fuel cell is prepared through enhanced activation treatment of activated carbon, reduction loading of platinum particles, combined purification, drying, multi-stage crushing and heat treatment. The method is simple in process, the platinum particle loading uniformity of the prepared catalyst for the proton exchange membrane fuel cell is effectively improved, the effective utilization rate of the catalyst for the proton exchange membrane fuel cell isincreased, and the prepared catalyst for the proton exchange membrane fuel cell has the characteristics of high activity, high purity and high dispersity.

Description

technical field [0001] The invention relates to a preparation method of a catalyst, in particular to a preparation process of a catalyst for a proton exchange membrane fuel cell. Background technique [0002] The catalyst used in proton exchange membrane fuel cells is a heterogeneous, loaded noble metal catalyst, the noble metals used are platinum, palladium, ruthenium, rhodium, silver, etc.; their d electron orbitals are not filled, and the surface is easy to adsorb and react It is a material with moderate strength, which is conducive to the formation of intermediate "active compounds", has high catalytic activity, and also has comprehensive excellent properties such as high temperature resistance, oxidation resistance, and corrosion resistance. [0003] At present, the catalysts used in proton exchange membrane fuel cells are mainly platinum-carbon catalysts, and their preparation methods can be divided into two categories: chemical reduction methods and physical methods. ...

Claims

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Application Information

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IPC IPC(8): H01M4/88H01M4/92B82Y30/00
CPCH01M4/8803H01M4/926B82Y30/00Y02E60/50
Inventor 钟发平符长平戴超华王玲
Owner 先进储能材料国家工程研究中心有限责任公司
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