Chinese Journal of Catalysis ›› 2023, Vol. 49: 132-140.DOI: 10.1016/S1872-2067(23)64443-2

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B atom dopant-manipulate electronic structure of CuIn nanoalloy delivering wide potential activity over electrochemical CO2RR

Jiao Wang, Fangfang Zhu, Biyi Chen, Shuang Deng, Bochen Hu, Hong Liu, Meng Wu, Jinhui Hao(), Longhua Li, Weidong Shi()   

  1. School of Chemistry and Chemical Engineering, Jiangsu University, Zhenjiang 212013, Jiangsu, China
  • Received:2023-03-15 Accepted:2023-04-27 Online:2023-06-18 Published:2023-06-05
  • Contact: *E-mail: jinhu1_hao@ujs.edu.cn (J. Hao), swd1978@ujs.edu.cn (W. Shi).
  • Supported by:
    National Natural Science Foundation of China(22225808);Sino-German Cooperation Group Project(GZ1579);Jiangsu Province Innovation Support Program International Science as well as Technology Cooperation Project(BZ2022045)

Abstract:

The accuracy and efficiency tuning the local electronic structure of catalyst active sites are pre-requisites for achieving high selectivity CO2 reduction reaction on a wide potential window, whereas remain a great challenge. Here, a B-doped CuIn alloy catalyst with tunable electronic structure for the highly effective electrochemical conversion of CO2 to CO has been exploited. The obtained B-doped CuIn alloy performs an optimal CO Faraday efficiency of 99% at -0.6 V (vs. the reversible hydrogen electrode) and particularly keeps outstanding CO Faraday efficiency (> 90%) over a wide cathodic electrochemical window (400 mV). Density functional theory theoretical calculation manifests that the enhanced performance is primarily ascribed to the electron-capturing ability of high valence state B atom, which optimizes the local electronic structure of adjacent metal active sites and adjusts the binding energy between catalyst and intermediates. A foundation of designing advanced electrochemical CO2 reduction reaction catalysts can be served by the insights gained though this research.

Key words: CO2 reduction, Wide potential window, High selectivity, B doping, Electronic structure