Preparation method of three-dimensional graphene/porphyrin compounded oxygen reduction electrocatalyst

Abstract

The invention discloses a preparation method of a three-dimensional graphene / porphyrin compounded oxygen reduction electrocatalyst. The preparation method comprises the following step of: (1) performing thermal treatment on three-dimensional grapheme at 300-800 DEG C for 30-90 min; and (2) agitating and mixing the thermally treated three-dimensional grapheme with the porphyrin under a liquid phase condition, performing centrifugal cleaning after reaction, and drying the product in vacuum to obtain three-dimensional graphene / porphyrin compounded oxygen reduction electrocatalyst. The three-dimensional graphene is thermally treated so as to obviously improve the oxygen reduction catalytic performance of the three-dimensional grapheme, and then the thermally treated three-dimensional grapheme is compounded with the porphyrin to prepare the graphene / porphyrin compounded catalyst. The compounded catalyst is better in oxygen reduction catalytic performance, long-term stability and obvious in anti-methanol catalyst performance, low in cost, stable in performance, and simple in preparation method, can be used as oxygen reduction electrocatalysts of commercial fuel batteries by replacing precious metal platinum.

Description

technical field [0001] The invention relates to a preparation method of an oxygen reduction electrocatalyst, in particular to a preparation method of a three-dimensional graphene / porphyrin composite oxygen reduction electrocatalyst. Background technique [0002] The electroreduction reaction of oxygen is one of the most important electrocatalytic reactions and is widely used in fuel cells and metal-air batteries. Platinum and platinum-based catalysts are currently commonly used catalysts for fuel cells, but they are expensive, have limited resources, and suffer serious performance loss during long-term operation, which hinders the development of fuel cells and other related fields. [0003] In view of the shortcomings of platinum-based catalysts such as high price, limited resources, and serious performance loss during long-term operation, carbon materials doped with specific elements (such as nitrogen, sulfur, boron, and phosphorus) have shown certain oxygen reduction perf...

AI Technical Summary

Problems solved by technology

Platinum and platinum-based catalysts are currently commonly used catalysts for fuel cells, but they are expensive, have limited resources, and suffer serious performance loss during long-term operation, which hinders the development of fuel cells and other related fields.

[0003] In view of the shortcomings of platinum-based catalysts such as high price, limited resources, and serious performance loss during long-term operation, carbon materials doped with specific elements (such as nitrogen, sulfur, boron, and phosphorus) have shown certain oxygen reduction performance in recent years, but the element Doping involves harsh conditions and cumbersome steps, making it difficult to achieve large-scale production

Images