Electroreduction carbon dioxide catalytic material, preparation method and applications thereof

Abstract

The invention relates to a carbon dioxide electroreduction catalytic material, a preparation method and applications thereof, wherein the electroreduction catalytic material is mainly a carbon-supported single atom catalytic material, and is synthesized by high-temperature carbonization, the synthetic raw materials comprise melamine, amino acid and acetate, a metal atom is embedded in a nitrogen-doped graphene substrate to form the structure of the material, and the material is used for carbon dioxide electrochemical reduction catalyst gas diffusion electrodes. According to the present invention, with the carbon dioxide electroreduction catalytic material, the utilization efficiency of the metal atom is significantly improved, the activity of the catalyst to the electroreduction of CO2 isincreased, the catalytic stability is improved, the hydrogen evolution reaction is effectively inhibited, the selectivity of the product CO is enhanced, and the potential window of the carbon dioxidereduction-to-CO is broadened.

Description

technical field [0001] The invention belongs to the field of electrochemistry, in particular to a highly efficient catalytic CO 2 Preparation method and application of electroreduced metal atom intercalated carbon catalyst. Background technique [0002] CO 2 It is not only a greenhouse gas that destroys the ecological environment, but also the most abundant carbon resource. Its conversion and utilization will have a profound impact on the environment and energy structure of the future society. However due to CO 2 It is in a stable state in energy and is almost inert, so its transformation faces great challenges. Electrochemical reduction of CO 2 Not only can it be converted efficiently, but also can reduce costs and realize large-scale production. [0003] Electrochemical CO 2 The products of conversion are complex, including various substances such as carbon monoxide, formic acid, methane, and ethylene. Based on the existing industrial production model, CO 2 High-ef...

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Problems solved by technology

CN104846393A uses Ag-containing electrodes to produce nearly 90% CO, but needs to add ionic liquids, resulting in greater pollution; CN104032324A uses polymetallic oxygen clusters as catalysts, and the preparation of catalysts is difficult, and the products are complex

It has been reported that metal phthalocyanines, especially nickel phthalocyanine and cobalt phthalocyanine, can effectively catalyze the electroreduction of CO 2 Produce CO, but the structure of this small molecular compound is very unstable under the reduction potential, and cannot generate stable and applicable current

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