Journal of Energy Chemistry ›› 2023, Vol. 86 ›› Issue (11): 569-578.DOI: 10.1016/j.jechem.2023.07.042

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Crystal facet engineering coexposed CuIn (200) and In (101) in CuIn alloy nanocatalysts enabling selective and stable CO2 electroreduction

Lulu Lia, Yang Zhanga, Xi Luoa, Israr Masood ul Hasana,f, Kai Wub,*, Bing Nand,*, Yanxing Zhange,*, Nengneng Xua,c, Jinli Qiaoa,c,*   

  1. aState Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Environmental Science and Engineering, Shanghai 201620, China;
    bCollege of Materials and Textile Engineering, Jiaxing University, Jiaxing 314001, Zhejiang, China;
    cShanghai Institute of Pollution Control and Ecological Security, Shanghai 200092, China;
    dShanghai Synchrotron Radiation Facility, Shanghai Advanced Research Institute, Chinese Academy of Sciences, Shanghai 201204, China;
    eSchool of Physics, Henan Normal University, Xinxiang 453007, Henan, China;
    fInstitute of Soil and Environmental Sciences, University of Agriculture Faisalabad, Faisalabad 38040, Pakistan
  • Received:2023-03-31 Revised:2023-07-08 Accepted:2023-07-23 Online:2023-11-15 Published:2023-11-07
  • Contact: *E-mail addresses: wk220802@zjxu.edu.cn (K. Wu), nanb@sari.ac.cn (B. Nan), zhangyanxing@htu.edu.cn (Y. Zhang), qiaojl@dhu.edu.cn (J. Qiao).

Abstract: The electrocatalytic carbon dioxide reduction reaction (eCO2RR) into high-value-added chemicals and fuels is a promising strategy to mitigate global warming. However, it remains a significant stumbling block to the rationally tuning lattice plane of the catalyst with high activity to produce the target product in the eCO2RR process. To attempt to solve this problem, the CuIn bimetallic alloy nanocatalyst with specifically exposed lattice planes is modulated and electrodeposited on the nitrogen-doped porous carbon cloth by a simple two-step electrodeposition method, which induces high Faraday efficiency of 80% towards HCOO- (FEHCOO-) with a partial current density of 13.84 mA cm-2 at -1.05 V (vs. RHE). Systematic characterizations and theoretical modeling reveal that the specific coexposed CuIn (200) and In (101) lattice facets selectively adsorbed the key intermediate of OCHO*, reducing the overpotential of HCOOH and boosting the FEHCOO- in a wide potential window (-0.65--1.25 V). Moreover, a homogeneous distribution of CuIn nanoparticles with an average diameter of merely ∼3.19 nm affords exposure to abundant active sites, meanwhile prohibiting detachment and agglomeration of nanoparticles during eCO2RR for enhanced stability attributing to the self-assembly electrode strategy. This study highlights the synergistic effect between catalytic activity and facet effect, which opens a new route in surface engineering to tune their electrocatalytic performance.

Key words: Electrocatalytic CO2 reduction reaction, CuIn alloy, Crystal facet engineering, Nanocatalyst