Photocatalytic Reduction of CO2 to CO and CH4 in Aqueous Suspensions of Modified Heterojunction Semiconductor Cu–MgO/SiC/ZnO

The reaction of photocatalytic reduction of CO 2 with water into CO and CH 4 in suspensions of the heterojunction semiconductor SiC/ZnO with copper metal Cu (0.5 wt %) deposited on its surface has been studied. The formation of CO and a small amount of CH 4 has been established; the methane yield in...

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Bibliographic Details
Published in:High energy chemistry 2023-12, Vol.57 (Suppl 2), p.S299-S303
Main Authors: Dzhabiev, T. S., Savinykh, T. A., Avdeeva, L. V., Dzhabieva, Z. M.
Format: Article
Language:English
Subjects:
Carbon dioxide
Carbon monoxide
Chemical reduction
Chemistry
Chemistry and Materials Science
Copper
Heterojunctions
Magnesium oxide
Methane
Physical Chemistry
Silicon carbide
Zinc oxide
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Summary:The reaction of photocatalytic reduction of CO 2 with water into CO and CH 4 in suspensions of the heterojunction semiconductor SiC/ZnO with copper metal Cu (0.5 wt %) deposited on its surface has been studied. The formation of CO and a small amount of CH 4 has been established; the methane yield increases fourfold and the CO yield sharply decreases when MgO is additionally deposited on the semiconductor surface. The maximum methane yield is achieved at a MgO content of 1 wt %; however, with a further increase in the amount of MgO, the CH 4 yield decreases. The mechanism of CO 2 reduction to CO in a two-electron process and to CH 4 in an eight-electron process is discussed.
ISSN:0018-1439
1608-3148
DOI:10.1134/S0018143923080088