期刊
CHEMSUSCHEM
卷 15, 期 8, 页码 -出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/cssc.202200188
关键词
CO2 reduction; formic acid; photocathode; photoelectrochemistry; Sn; TiO2; Si
资金
- National Natural Science Foundation of China [51961165107]
- Shanghai International Cooperation Project [19520761000]
- Shanghai Natural Science Foundation [19ZR1464500]
- MOST grant [108-2218-E-002-039-MY3]
By synthesizing a novel photocathode Sn/TiO2/Si, the light absorption performance and electron transfer efficiency can be improved, promoting efficient photoelectrochemical reduction of CO2 to produce liquid products, with great potential.
Using renewable energy to convert CO2 into liquid products, as a sustainable way to produce fuels and chemicals, has attracted intense attention. Herein, a novel heterostructured photocathode composed of Si wafer, TiO2 layer, and Sn metal particles has been successfully fabricated by combining of a facile hydrothermal and electrodeposition method. The obtained Sn/TiO2/Si photocathode shows enhanced light absorption performance by the surface plasmon resonance effect of Sn metal. Especially, the Sn/TiO2/Si photocathode together with rich oxygen vacancy defects jointly promote photoelectrochemical CO2 reduction, harvesting a high faradaic efficiency of HCOOH and a desirable average current density (-4.72 mA cm(-2)) at -1.0 V vs. reversible hydrogen electrode. Significantly, the photocathode Sn/TiO2/Si also shows good stability due to the design of protecting layer TiO2. This study provides a facile strategy of constructing an efficient photocathode to improve the light absorption performance and the electron transfer efficiency, exhibiting great potential in the CO2 reduction.
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