Preparation method of carbon film coated platinum/graphene catalyst

Abstract

The invention discloses a preparation method of a carbon film coated platinum / graphene catalyst. Graphene is adopted as a carrier for the catalyst to hydrothermally reduce oxidized graphene, saccharides, polyvinyl pyrrolidone and chloroplatinic acid, and then high-temperature carbonization is carried out to obtain a cathode oxygen reduction reaction catalyst of a fuel battery, wherein the platinum loading amount is 10-50wt%. The catalyst has excellent methanol tolerance and catalytic cycle stability, the performances of the catalyst are greatly improved in 1000 times of cyclic voltammetry testing, and the catalyst is superior to the commercial platinum / carbon catalyst.

Description

technical field

[0001] The invention relates to a method for preparing a cathode oxygen reduction reaction catalyst for a fuel cell, in particular to a method for preparing a carbon film-coated platinum / graphene catalyst. Background technique

[0002] At present, the commonly used fuel cell cathode oxygen reduction reaction catalyst is a carbon-supported platinum-based catalyst. Although the platinum / carbon catalyst has good catalytic performance for the oxygen reduction reaction, it suffers from catalyst particle shedding, aggregation, and poor methanol tolerance. A series of serious problems such as poor cycle stability make it difficult to meet the needs of actual use. Alloying, morphology control, and carrier loading are three possible avenues to address these issues. Among them, as a two-dimensional layered material with ultra-high specific surface area, excellent electrochemical stability and electrical conductivity, graphene is expected to be widely used in the prepa...

Images