Preparation method and application of iron-nitrogen co-doped porous carbon sphere material

Abstract

The invention discloses a preparation method for an iron-nitrogen co-doped porous carbon sphere material. The preparation method comprises the following steps: by taking 2-aminopyridine as a monomer and taking ammonium persulfate and ferric chloride as oxidants, performing in-situ polymerization reaction in a duct of a porous silicon dioxide template to obtain a precursor; performing high-temperature carbonization treatment on the precursor in a tubular furnace and an inert gas nitrogen-gas environment; and removing the silicon dioxide template by hydrofluoric acid to obtain the iron-nitrogen co-doped porous carbon sphere material which is taken as an electric catalyst to achieve good catalytic effect in oxygen gas reduction reaction. The preparation method has the advantages that the process is simple and easy to perform and the raw materials are cheap. The prepared carbon material contains a three-dimensional communicated pore structure, has a high specific surface area and a large pore volume, can effectively improve the electric catalytic activity through the heteroatom nitrogen-iron doping, has relatively high electric catalytic efficiency while being applied as a low-price electric catalyst, and has an important value and significance in the fields of doped type porous carbon material preparation and proton membrane fuel battery electric catalysis.

Description

technical field [0001] The invention relates to a preparation technology of a hierarchical porous carbon material, in particular to a preparation method and application of an iron-nitrogen co-doped porous carbon sphere material. Background technique [0002] In recent years, with the aggravation of energy crisis and environmental pollution, efficient and clean fuel cells and metal-air batteries have received more and more attention. For the above two types of batteries, the cathode needs to use a catalyst with electrocatalytic activity to promote the occurrence of oxygen reduction reaction. At present, the best oxygen reduction catalysts are platinum and its alloy catalysts, however, their large-scale application is limited due to their high price, low stability and weak resistance to methanol. Currently, non-noble metal catalysts, especially carbon materials co-doped with transition metals and nitrogen, exhibit excellent electrocatalytic activity under both alkaline and a...

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Problems solved by technology

However, the catalysts prepared by the above methods are expensive or the raw materials are expensive, or the preparation conditions are harsh, or the catalytic effect under acidic conditions is not ideal, which limits their further application in proton membrane fuel cells.

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