Preparation method and application of a carbon nanofiber-based electrocatalyst

Abstract

The invention provides a method for preparing a carbon nanofiber-based electrocatalyst, comprising the following steps: dispersing candle ash in an organic solvent, then adding a high molecular polymer and dibenzyl disulfide, stirring, and then adding cobalt salt and nickel salt, continue to stir to obtain a precursor solution; electrospin the precursor solution, collect the fiber precursor, and dry; dry the dried fiber precursor at 150-300°C for 1-3 hours, and then carbonize at high temperature in an inert atmosphere , to obtain carbon nanofiber-based electrocatalysts. The carbon nanofiber-based electrocatalyst prepared by the invention has excellent electrocatalytic performance and cycle stability.

Description

A kind of preparation method and application of carbon nanofiber-based electrocatalyst technical field The invention belongs to the technical field of electrocatalysis, relate to a kind of preparation method of carbon nanofiber-based electrocatalyst and application thereof use. Background technique [0002] The increasing exhaustion of fossil energy has become a major problem faced by human survival and sustainable development in the future. Finding a clean, efficient and sustainable new energy system to replace traditional non-renewable fossil energy has become a pressing task. A major challenge looms. Since 2009, Gong K et al. (Gong, K.; Du, F.; Xia, Z.; Durstock, M.; Dai, L. Nitrogen‑doped carbon nanotube arrays with high electrocatalytic activity for oxygen reduction. Science 2009, 323(5915), 760‑4) discovered vertically grown N-doped nanocarbons Rice tubes have good catalytic properties, and more and more researchers have turned their attention to doping and ...

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Problems solved by technology

[0004] However, although a lot of work has been devoted to the research of carbon-based non-noble metal electrocatalysts and some progress has been made, there are still several problems to be solved urgently regarding the design and preparation of new non-noble metal catalysts: First, the non-noble metal catalysts The conductivity of the catalyst is poor, which is not conducive to the process of charge and mass transfer; second, most of the non-noble metal electrocatalysts studied have poor stability, which greatly increases the practical cost; third, the exposed active sites of the prepared catalysts The number of points is small, which is not conducive to the further improvement of performance; Fourth, the electrochemical reaction kinetics at the interface is slow, which hinders the efficient conversion of energy

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