S-doped Sn oxide catalytic electrode and preparation and application thereof

Abstract

The invention discloses an S-doped Sn oxide catalytic electrode, preparation thereof and application of the S-doped Sn oxide catalytic electrode in reduction of carbon dioxide to produce formate and formaldehyde. The preparation method comprises the following steps: uniformly dispersing S-SnO2 nano material powder, a multi-walled carbon nanotube and a surfactant in ethylene glycol to obtain a mixed solution, immersing and absorbing a substrate electrode in the mixed solution, taking out and drying to obtain an electrode loaded with S-SnO2 and the multi-walled carbon nanotube, namely the S-doped Sn oxide catalytic electrode; and the preparation method of the S-SnO2 nano material powder comprises the following steps: (1) mixing and grinding NaOH, SnCl4. 5H2O and Na2S2O3. 5H2O in a molar ratio of (1-3): (0.05-0.15): (0.03-0.07) for 5-20 minutes, standing and aging for 2-4 hours, and then heating in an oven at 120-180 DEG C for 1-3 hours in an open manner to obtain a precursor mixture; and (2) stirring and soaking the precursor mixture in deionized water for 0.5-1.5 hours, then centrifugally washing, and finally drying at 60-120 DEG C to obtain the S-SnO2 nano material powder.

Description

technical field [0001] The invention relates to the technical field of carbon dioxide reduction, in particular to an S-doped Sn oxide catalytic electrode and its preparation and application in carbon dioxide reduction to produce formate and formaldehyde. Background technique [0002] After mankind entered the industrial age, the demand for energy continued to grow, and the energy crisis has become a major problem restricting human development. At the same time, the excessive use of fossil fuels leads to a large amount of CO 2 The gas is emitted into the atmosphere, which in turn causes a serious environmental problem, the "greenhouse effect", the direct consequence of which is global warming. In the face of energy crisis and greenhouse effect, hope to capture and store CO 2 , but CO 2 There are still many problems in the storage, such as hidden dangers of leakage. Therefore, in recent years the CO 2 The recycling of resources has aroused extensive attention of researche...

AI Technical Summary

Problems solved by technology

At the same time, the excessive use of fossil fuels leads to a large amount of CO 2 The gas is emitted into the atmosphere, which in turn causes a serious environmental problem, the "greenhouse effect", the direct consequence of which is global warming

Facing the energy crisis and the greenhouse effect, hope to capture and store CO 2 , but CO 2 There are still many problems in the storage, such as the hidden danger of leakage

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