Construction of Heterostructured Sn/TiO2/Si Photocathode for Efficient Photoelectrochemical CO2 Reduction

Chengjin Li, Xiaoxia Zhou, Qingming Zhang, Yi Xue, Zhaoyu Kuang, Han Zhao, Chung Yuan Mou, Hangrong Chen

研究成果: 雜誌貢獻文章同行評審

摘要

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.

原文英語
文章編號e202200188
期刊ChemSusChem
15
發行號8
DOIs
出版狀態已發佈 - 4月 22 2022
對外發佈

ASJC Scopus subject areas

  • 環境化學
  • 化學工程 (全部)
  • 材料科學(全部)
  • 能源(全部)

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