Monatomic copper/boron double-site multifunctional catalyst as well as preparation method and application thereof

Abstract

According to the monatomic copper / boron double-site multifunctional catalyst and the preparation method and application thereof, copper salt serves as a metal source, a cyanamide compound serves as a nitrogen source, organic acid serves as a dissolving agent of chitosan, soluble boron salt serves as a boron source, chitosan serves as a carbon source, silicon dioxide and frozen ice serve as double templates, a pyrolysis-etching-activation strategy is adopted, and the monatomic copper / boron double-site multifunctional catalyst is prepared. And the copper / boron double-site catalyst material with the hierarchical porous structure is successfully prepared. The catalyst has a hierarchical porous structure, provides abundant mass transfer channels for catalytic reaction, and further realizes efficient catalytic performance. In addition, the catalyst can also be used for reducing carbon dioxide to prepare synthesis gas. Compared with the prior art, the method for preparing the monatomic copper / boron double-site multifunctional catalyst material is simple, reliable, low in production cost, short in process, low in equipment requirement, easy to amplify experiments and capable of achieving industrial large-scale production.

Description

technical field [0001] The invention belongs to the field of catalysts and relates to the preparation and application of a single-atom site catalyst, in particular to a single-atom copper / boron double site multifunctional catalyst, a preparation method and an application. Background technique [0002] Single-atom site catalysts have attracted extensive attention and have positive application value in many fields. The current work mainly focuses on the construction of single metal atomic sites, because of the performance limitations of restricted single metal sites, the development of efficient methods to prepare catalysts with binary or multi-component sites has attracted great interest. Studies have shown that diatomic site catalysts have significantly better performance than single metal single-atom site catalysts. The problems of the currently developed single-atom site catalysts, such as low loading capacity and incapability of large-scale production, limit their furthe...

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Problems solved by technology

For example, copper single atoms were deposited on the surface of nitrogen-sulfur co-doped graphene by electrochemical deposition, but limited by the size of the electrode area and poor controllability, this method is difficult to mass-produce

Similarly, copper single atoms are prepared by thermally evaporating foamed copper with ammonia gas, which is expensive and difficult to produce on a large scale.

[0004] In the prior art, the research around copper-based single-atom site catalysts mainly focuses on the preparation of a single copper site, and the development of copper-based double-site catalysts is still very limited; the preparation method of copper-based single-atom catalysts cannot be mass-produced

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