SnOx catalyst with multi-layer structure as well as preparation method and application of SnOx catalyst

Abstract

The invention belongs to the field of electrocatalytic materials and particularly relates to a SnOx catalyst with a multi-layer structure as well as a preparation method and an application of the SnOxcatalyst. The preparation process of the SnOx catalyst is redesigned in a targeted manner by sufficiently combining characteristics and demands of a CO2 electro-catalyst, the SnOx catalyst with the multi-layer structure is correspondingly prepared with a hydrothermal method under the joint action of hydrolysis and coordination, and the catalyst can selectively reduce CO2 into HCOO<->, has excellent catalytic activity when used for electrocatalytic reduction of CO2 into formate in an aqueous solution and also has good stability and durability, so that the technical problem of insufficient efficiency and stability when the conventional tin oxide catalyst is used for electrocatalytic reduction of CO2 is solved.

Description

technical field [0001] The invention belongs to the field of electrocatalytic materials, more specifically, relates to a SnO with multilayer structure x Catalysts, their preparation and applications. Background technique [0002] CO 2 As the most important greenhouse gas, it contributes about 56% to the greenhouse effect; at the same time, countries in the world generally face the serious problem of shortage of energy and basic chemical raw materials, while 2 As a potential carbon resource, it is currently a hot spot in research, development and utilization at home and abroad. from CO 2 It can directly reduce and synthesize useful chemical products such as methane, methanol, formaldehyde, formic acid, urea, low-carbon hydrocarbons, carbonates and polymers. Development CO 2 The use of technology can not only save fossil resources such as oil, natural gas and coal, but also turn harm into wealth, reduce its environmental pollution, and have obvious economic and environmen...

AI Technical Summary

Problems solved by technology

[0006] Aiming at the above defects or improvement needs of the prior art, the present invention provides a SnO with a multilayer structure x Catalyst, its preparation method and use, which fully binds CO 2 The characteristics and requirements of electrocatalysts, targeting SnO x The preparation process of the catalyst was redesigned, and a SnO with a multi-layer structure was obtained through the combined action of hydrolysis and coordination and hydrothermal method. x catalyst, the catalyst can convert CO 2 Selective reduction to HCOO - , which was applied to the electrocatalytic reduction of CO in aqueous solution 2 Converted into formate, it has excellent catalytic activity. The catalyst itself also has good stability and durability, thus solving the problem of the existing tin oxide catalyst in the electrocatalytic reduction of CO 2 The technical problem of insufficient time efficiency and stability

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