1. Designing atomic Ni/Cu pairs on a reactive BiOCl surface for efficient photo-chemical HCO3−-to-CO conversion.
- Author
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Ke, Da, Sun, Bingjie, Zhang, Yanjun, Tian, Fan, Chen, Yu, Meng, Qingwen, Zhang, Yixuan, Hu, Zhangyi, Yang, Hongzhou, Yang, Chenyu, Xiong, Xuyang, and Zhou, Tengfei
- Abstract
Solar-driven conversion of bicarbonate (HCO
3 − ) to carbonaceous fuels and/or chemicals provides an alternative route for the development of sustainable carbon economies. However, promoting the HCO3 − reduction rate and tuning product selectivity remain significant challenges. This study reports the identification of isolated Ni/Cu atomic pairs dispersed on a BiOCl surface (Ni1 /Cu1 -BOC) as a promising candidate for efficient HCO3 − reduction under UV-vis light irradiation. The optimized photocatalyst exhibits a high CO formation rate of 157.1 μmol g−1 h−1 with nearly 100% selectivity, even in the absence of added proton sources, sacrificial agents, or sensitizers. Experimental and theoretical investigations reveal that the atomically dispersed Ni/Cu pairs facilitate the protonation of HCO3 − to CO2 , which then undergoes a H+ -assisted reduction pathway to produce CO, with *COOH as the intermediate. The synergistic effects of the Ni/Cu atomic pairs simultaneously promote the HCO3 − -to-CO2 conversion and the subsequent CO2 -to-CO reduction, providing valuable insights for the development of efficient diatomic catalysts for photocatalytic HCO3 − reduction reactions. [ABSTRACT FROM AUTHOR]- Published
- 2024
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