Authors: Juan‐Ru Huang, Wen‐Xiong Shi, Shen‐Yue Xu, Hao Luo, Jiangwei Zhang, Tong‐Bu Lu, Zhi‐Ming Zhang
Published: 2023-11-08
Source: Full article
AbstractControllable methanol production in artificial photosynthesis is highly desirable due to its high energy density and ease of storage. Herein, single atom Fe is implanted into TiO2/SrTiO3(TSr) nanotube arrays by two‐step anodization and Sr‐induced crystallization. The resulting Fe‐TSr with both single Fe reduction centers and dominant oxidation facets (001) contributes to efficient CO2photoreduction and water oxidation for controlled production of CH3OH and CO/CH4. The methanol yield can reach to 154.20 µmol gcat−1h−1with 98.90% selectivity by immersing all the catalyst in pure water, and the yield of CO/CH4is 147.48 µmol gcat−1h−1with >99.99% selectivity when the catalyst completely outside water. This CH3OH yield is 50 and 3 times higher than that of TiO2and TSr and stands among all the state‐of‐the‐art catalysts. The facile gas–solid and gas–liquid–solid phase switch can selectively control CH3OH production from ≈0% (above H2O) to 98.90% (in H2O) via slowly immersing the catalyst into water, where abundant •OH and H2O around Fe sites play important role in selective CH3OH production. This work highlights a new insight for water‐mediated CO2photoreduction to controllably produce CH3OH.