Fe, Ni and N three-doped carbon nanotube coated type FeNi@NCNT catalyst as well as preparation method and application thereof

A technology of carbon nanotubes and catalysts, applied in chemical instruments and methods, physical/chemical process catalysts, chemical/physical processes, etc., can solve the problems of difficult separation of nanofibers, low yield, poor strength, etc., and achieve improved electrochemical performance. Activity and stability, high specific surface area and conductivity, effect of inhibiting aggregation
CN108543545AInactive Publication Date: 2018-09-18DALIAN UNIV OF TECH
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
DALIAN UNIV OF TECH
Publication Date
2018-09-18
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention discloses a Fe, Ni and N three-doped carbon nanotube coated type FeNi@NCNT catalyst as well as a preparation method and application thereof, and belongs to the fields of energy materialsand electrochemistry. The catalyst is prepared by using dicyandiamide as a C source and N source and ammonium ferric citrate and NiCl2.6H2O as metal sources, adopting one pot method and performing pyrolysis in two steps; and a plurality of Fe and Ni metal particles in the catalyst are uniformly wrapped in walls of ''bamboo-like'' N-doped carbon nanotubes, and a small number of the particles are distributed at the tip ends of the carbon nanotubes. Compared with a common metal alloy oxygen reduction reaction and oxygen evolution reaction bifunctional catalyst, the catalyst disclosed by the invention exhibits good oxygen evolution reaction activity and stability under alkaline conditions; the preparation method is simple, and raw materials used in the method have low costs and wide sources;and the catalyst can be widely used in the fields of proton exchange membrane fuel cells, electrolyzed water, metal-air batteries and the like, and has higher practical value.
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Description

technical field

[0001] The invention belongs to the field of energy materials and electrochemistry, and relates to an electrocatalyst and a preparation method applied to fuel cells, electrolyzed water, and metal-air batteries for oxygen reduction reactions and oxygen evolution reactions, and in particular to a Fe, Ni, N triple-doped electrocatalyst Heterocarbon nanotube-coated FeNi@NCNT catalyst, preparation method and application. Background technique

[0002] Fuel cells, electrolyzed water, and metal-air batteries have been the research hotspots of domestic and foreign scholars in recent years. However, the slow kinetics of the oxygen electrode reaction (oxygen reduction reaction (ORR) and oxygen evolution reaction (OER)) is a bottleneck problem that greatly limits its rapid development. It is urgent to develop efficient catalysts to increase the reaction rate and reduce the overpotential. At present, Pt-based catalysts are recognized as the catalysts with the best cataly...

Claims

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