Preparation process of catalyst for proton exchange membrane fuel cell

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. ...

AI Technical Summary

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 of the catalyst after synthesis generally adopts ordinary washing and filtration, which is not conducive to the fine separation of impurity elements; and after the catalyst is purified and dried from the reaction solution, the ordinary crushing method is used, which cannot ensure the particle size and dispersion effect