Core–Shell In/Cu 2 O Nanowires Schottky Junction for Enhanced Photoelectrochemical CO 2 Reduction under Visible Light

作者：Qingmei Wang, Yanfang Zhang, Yang Liu, Keke Wang, Weixin Qiu, Long Chen, Jie Li, Wenzhang Li · 发表于：Industrial & Engineering Chemistry Research · 年份：2022 · DOI：10.1021/acs.iecr.2c02579 · 被引用次数：18 · 研究领域：Advanced Photocatalysis Techniques、Copper-based nanomaterials and applications、CO2 Reduction Techniques and Catalysts

Photoelectrochemical (PEC) CO 2 reduction into chemical fuels is a promising strategy to alleviate the energy and environmental crisis. However, it remains a challenge to design efficient photocathodes for PEC CO 2 reduction. Here, we constructed Cu 2 O-indium (In) core–shell nanowires Schottky junction assisted by physical vapor deposition to boost PEC CO 2 reduction. The research of charge transport kinetics shows that the construction of Schottky junction effectively promotes the transfer and separation of photogenerated electrons. In addition, the introduction of In improves the catalytic activity of the Cu 2 O, and the CO yield reaches 75.94 μmol cm –2 h –1 at −0.7 V vs RHE. The In/Cu 2 O photocathode exhibits consistent Faradaic efficiency for CO (82%) over 12 h. In situ Fourier transformed infrared spectroscopy spectra results indicate that the introduction of In promotes the absorption and accumulation of COOH* intermediate, thereby promoting the release of CO. The study proposes a feasible strategy for designing and fabricating PEC CO 2 reduction photocathodes with high catalytic activity to treat atmospheric CO 2 .