Nitrogen-doped carbon nanofiber electrocatalyst and preparation method and application thereof

Abstract

The invention discloses a nitrogen-doped carbon nanofiber electrocatalyst and a preparation method and application thereof. The method comprises: dissolving copper chloride dihydrate, polyvinylpyrrolidone and polyacrylonitrile in an N, N-dimethylformamide (DMF) solvent to obtain a spinning solution, then carrying out electrospinning through an electrospinning technique to obtain a copper chloride/polyvinylpyrrolidone/polyacrylonitrile nanofiber membrane, and orderly carrying out hydrothermal treatment, post-treatment, pre-oxidation treatment and carbonization treatment on the nanofiber membrane to obtain the porous nitrogen particle-loaded nitrogen-doped carbon nanofiber electrocatalyst with a certain mechanical strength. The preparation method is simple and is suitable for large-scale production. The nitrogen-doped carbon nanofiber electrocatalyst can be used for electric reduction of carbon dioxide.

Description

technical field [0001] The invention relates to the technical field of nanocomposite material preparation, in particular to a nitrogen-doped carbon nanofiber electrocatalyst and its preparation method and application. Background technique [0002] Global warming and the energy crisis are two important issues we face in the 21st century. Both problems stem from the unsustainable overuse of fossil fuels, with the accompanying release of the greenhouse gas carbon dioxide. The electroreduction of CO2 powered by renewable electricity resources not only contributes to the reduction of CO2 emissions, but also has the potential to solve the problem of energy shortage. So far, various noble metals (Ag, Au, Pt, etc.) and metal complexes have been used as catalysts (as electrodes) for CO2 electroreduction. However, the rising cost of noble metals is a major obstacle for their large-scale practical applications, and thus, there is an increasing trend to develop cost-effective metal-fr...

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Problems solved by technology

[0005] In view of the above-mentioned deficiencies in the prior art, the object of the present invention is to provide a nitrogen-doped carbon nanofiber electrocatalyst and its preparation method and application, aiming at solving the problem that most of the existing electrochemical catalyst materials are powdered and need to be sticky. Coating agent to a specific carrier, resulting in unstable structure, easy to fall off, difficult to recycle, and cannot be mass-produced

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