A kind of carbon template induces Fe-N growth to prepare the method of carbon catalyst and carbon catalyst

Abstract

The invention relates to a method for preparing a carbon catalyst based on carbon template-induced Fe-N growth and the carbon catalyst. The preparation method of the catalyst comprises the following steps of 1) dispersing a carbon material into a solvent A, and then performing wet ball milling, freezing and drying to obtain a carbon template; 2) dissolving a Fe compound and an N compound into a solvent B, and then adding the carbon template, performing uniform mixing and drying to obtain a catalyst precursor; and 3) performing high-temperature pyrolysis on the catalyst precursor in gas atmosphere to obtain the Fe and N co-doped carbon catalyst. Compared with the prior art, the preparation method disclosed in the invention can suppress generation of non-active or weak active metal Fe particles, Fe carbide and the like by virtue of introduction of the carbon template, so as to promote conversion of the metal Fe particles, Fe carbide and the like to strong active Fe-N<x> species to inducegrowth of Fe-N<x> strong active sites and the like; and in addition, interaction can be generated between the carbon template and the Fe-N<x> active sites and the like, so that the electronic structure can be regulated and enhancement of the inherent activity can be improved.

Description

Technical field [0001] The invention belongs to the technical field of clean energy, and relates to a method for preparing a carbon catalyst by carbon template inducing Fe-N growth and a carbon catalyst. Background technique [0002] Clean energy technologies such as fuel cells and metal-air batteries have received extensive attention from countries all over the world, and the oxygen reduction reaction involved is the core of the electrochemical reaction process. At present, Pt and its alloy catalysts are still the most commonly used oxygen reduction catalysts, but the Pt reserves in nature are scarce and cannot meet the future market demand in the new energy field. Therefore, high-performance non-noble metal catalysts have become one of the research directions. [0003] A lot of research work has shown that Fe and N co-doped carbon materials are a kind of non-noble metal catalysts with great potential and can be used to replace Pt-based catalysts. Researchers have tried various ...

AI Technical Summary

Problems solved by technology

Researchers have tried various methods to improve the oxygen reduction catalytic activity of Fe and N co-doped carbon catalysts, including changing the type and amount of Fe and N precursors, optimizing material synthesis conditions, constructing various nanostructures and composite materials, Measures such as effective post-treatment, and the use of various characterization techniques are expected to explain the intrinsic relationship between catalyst activity and structure and components, but the problem of low activity of this type of catalyst has not been effectively resolved, which limits the ability of Fe and N to co-exist. Further Applications of Doped Carbon Catalysts

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