Atomically Dispersed Electron Traps in Cu Doped BiOBr Boosting CO 2 Reduction to Methanol by Pure H 2 O

作者：Ke Wang, Ming Cheng, Fanjie Xia, Ning Cao, Fanxing Zhang, Wenkang Ni, Xuanyu Yue, Keping Yan, Yi He, Yao Shi, Wenxin Dai, Pengfei Xie · 发表于：Small · 年份：2023 · DOI：10.1002/smll.202207581 · 被引用次数：54 · 研究领域：Advanced Photocatalysis Techniques、Copper-based nanomaterials and applications、CO2 Reduction Techniques and Catalysts

Abstract Overall photocatalytic conversion of CO 2 and pure H 2 O driven by solar irradiation into methanol provides a sustainable approach for extraterrestrial synthesis. However, few photocatalysts exhibit efficient production of CH 3 OH. Here, BiOBr nanosheets supporting atomic Cu catalysts for CO 2 reduction are reported. The investigation of charge dynamics demonstrates a strong built‐in electric field established by isolated Cu sites as electron traps to facilitate charge transfer and stabilize charge carriers. As result, the catalysts exhibit a substantially high catalytic performance with methanol productivity of 627.66 µmol g catal −1 h −1 and selectivity of ≈90% with an apparent quantum efficiency of 12.23%. Mechanism studies reveal that the high selectivity of methanol can be ascribed to energy‐favorable hydrogenation of *CO intermediate giving rise to *CHO. The unfavorable adsorption on Cu 1 @BiOBr prevents methanol from being oxidized by photogenerated holes. This work highlights the great potential of single‐atom photocatalysts in chemical transformation and energy storage reactions.