Shang Huishan, Wang Tao, Pei Jiajing, Jiang Zhuoli, Zhou Danni, Wang Yu, Li Haijing, Dong Juncai, Zhuang Zhongbin, Chen Wenxing, Wang Dingsheng, Zhang Jiatao, Li Yadong
Beijing Key Laboratory of Construction Tailorable Advanced Functional Materials and Green Applications, School of Materials Science and Engineering, Beijing Institute of Technology, Beijing, 100081, China.
SUNCAT Center for Interface Science and Catalysis, Department of Chemical Engineering, Stanford University, Stanford, CA, 94305, USA.
Angew Chem Int Ed Engl. 2020 Dec 7;59(50):22465-22469. doi: 10.1002/anie.202010903. Epub 2020 Oct 6.
Main-group element indium (In) is a promising electrocatalyst which triggers CO reduction to formate, while the high overpotential and low Faradaic efficiency (FE) hinder its practical application. Herein, we rationally design a new In single-atom catalyst containing exclusive isolated In -N atomic interface sites for CO electroreduction to formate with high efficiency. This catalyst exhibits an extremely large turnover frequency (TOF) up to 12500 h at -0.95 V versus the reversible hydrogen electrode (RHE), with a FE for formate of 96 % and current density of 8.87 mA cm at low potential of -0.65 V versus RHE. Our findings present a feasible strategy for the accurate regulation of main-group indium catalysts for CO reduction at atomic scale.
主族元素铟（In）是一种很有前景的电催化剂，可促使CO还原生成甲酸盐，但其高过电位和低法拉第效率（FE）阻碍了其实际应用。在此，我们合理设计了一种新型铟单原子催化剂，该催化剂含有独特的孤立In-N原子界面位点，可高效地将CO电还原为甲酸盐。与可逆氢电极（RHE）相比，该催化剂在-0.95 V时表现出高达12500 h的极大周转频率（TOF），在-0.65 V（相对于RHE）的低电位下，甲酸盐的FE为96%，电流密度为8.87 mA cm。我们的研究结果为在原子尺度上精确调控主族铟催化剂用于CO还原提供了一种可行的策略。
