Porous zinc-tin bimetallic oxide as well as preparation method and application thereof

Abstract

The invention relates to a porous zinc-tin bimetallic oxide as well as a preparation method and application thereof. The preparation method comprises the following steps: S1, dissolving zinc nitrate hexahydrate, stannous chloride dihydrate and a template in methanol and carrying out ultrasonic treatment; s2, dissolving an alkaline substance in methanol to prepare 0.5 mol / L alkaline liquor; s3, dropwise adding the alkali liquor in S2 into the solution in S1, continuously stirring, adjusting the pH value of the solution to 7-9, and continuously stirring for 1-2 hours; s4, pouring the mixed solution into a lining of a hydrothermal reaction kettle, and then putting the hydrothermal reaction kettle into a muffle furnace for hydrothermal reaction; centrifuging, and washing with deionized water and ethanol for three times to obtain a primary product; performing vacuum drying; and S5, calcining in a muffle furnace. The porous zinc-tin bimetallic oxide obtained by the invention is used as a catalyst for electrocatalytic reduction of carbon dioxide into a carbon-one product, and has the advantages of extremely high specific surface area, Faraday efficiency of electrocatalytic reduction of carbon dioxide into the carbon-one product, and good stability of the material.

Description

technical field [0001] The invention belongs to the technical field of electrocatalysts, and in particular relates to a porous zinc-tin double metal oxide and its preparation method and application. Background technique [0002] Since the industrial revolution, the excessive use of fossil fuels has led to the continuous increase of the concentration of carbon dioxide in the atmosphere, and the resulting greenhouse effect has become increasingly obvious. Converting atmospheric carbon dioxide into value-added products by electrical energy is an effective way to solve the above problems. However, the carbon-oxygen double bond is very stable, and it takes a lot of energy to break it. Therefore, the development of efficient electrocatalysts to reduce energy consumption has become an urgent problem to be solved. In the past few decades, noble metal catalysts represented by silver have been considered the most active catalysts for electrocatalytic carbon dioxide reduction, but the...

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Problems solved by technology

This composite catalytic material is prepared by hydrothermally forming stannate / tin oxide with zinc chloride, sodium citrate and tin chloride, and then calcined at 700°C for two hours in an air atmosphere. The specific surface area of ​​the material is relatively low, only There are 9.9m2 / cm, due to the small specific surface area, not enough active sites can be exposed, so the catalytic activity is still far from the requirements of industrial applications

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