Chinese Journal of Catalysis ›› 2026, Vol. 91: 163-175.DOI: 10.1016/S1872-2067(26)65208-4

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Machine learning-accelerated electrocatalytic microkinetic model for global reaction network simulation of CO2 reduction reaction

Xiao-Li Lianga,1, Zhao-Yu Wanga,1, Shi-Lin Yana, Ting-Ting Yina, Wei Zhangb,c,*(), Hao Zhanga,*(), Xiaohong Liud, Liu-Bin Zhaoa,*()   

  1. a Department of Chemistry, School of Chemistry and Chemical Engineering, Southwest University, Chongqing 400715, China
    b Chongqing Institute of Green and Intelligent Technology, Chinese Academy of Sciences, Chongqing 400714, China
    c State Key Laboratory of Woody Oil Resource Utilization, College of Materials and Energy, Central South University of Forestry and Technology, Changsha 410004, Hunan, China
    d National University of Singapore (Chongqing) Research Institute, Chongqing 401123, China
  • Received:2026-03-19 Accepted:2026-05-13 Online:2026-12-18 Published:2026-10-13
  • About author:1Contributed equally to this work.
  • Supported by:
    Open Funds of State Key Laboratory of Physical Chemistry of Solid Surfaces(Xiamen University No.202421);Natural Science Foundation of Chongqing, China(CSTB2024NSCQ-MSX0344);Natural Science Foundation of Chongqing, China(CSTB2023NSCQ-MSX0768);Natural Science Foundation of Chongqing, China(cstc2021jcyj-jqX0031);Na-tional Natural Science Foundation of China(51832008);Na-tional Natural Science Foundation of China(62175237);Interdisciplinary Team Project under Auspices of “Light of West” Pro-gram in Chinese Academy of Sciences(xbzg-zdsys-202106);Young Scholar of Regional Development Program in Chinese Academy of Sciences(2021)

Abstract:

Electrochemical CO2 reduction represents a sustainable route for energy storage and carbon utilization. Despite copper-based catalysts uniquely enabling hydrocarbons and oxygenates product formation, advancing this technology requires deeper mechanistic insights and accelerated catalyst screening. Herein, we establish a novel electrocatalysis research framework integrating three synergistic components: (1) With a force convergence accuracy of 0.02 eV/Å, the AdsorbML-FT workflow can achieve a 24-fold acceleration in DFT optimization steps whilst accounting for adsorption site screening, thereby enabling more efficient energy calculations for general substrate-adsorbate systems; (2) the global reaction network simulation of CO2RR enabling broader coverage of reaction mechanism including 22 surface species and 40 elementary reactions beyond traditional optimal-path limitations; (3) the electrocatalytic microkinetic model ensuring greater accuracy in predicting both catalytic activity and product selectivity. This integrated approach quantitatively decodes the CO2-to-C1 mechanism on Cu(111) and systematically screens 37 Cu3M1 alloys. We identify Cu3Al1 as an optimal catalyst, driving CO conversion at relatively low overpotentials with simultaneously high catalytic activity and CH4 product selectivity. The proposed machine learning-accelerated electrocatalytic microkinetic model bridges theoretical simulations with experimental measurements, offering a transformative tool for rapid electrocatalyst discovery.

Key words: CO2 reduction reaction, Machine learning, Density functional theory, Microkinetic model, Reaction mechanism