Chinese Journal of Catalysis ›› 2023, Vol. 54: 265-277.DOI: 10.1016/S1872-2067(23)64546-2

• Articles • Previous Articles     Next Articles

Constructing dual electron transfer channels to accelerate CO2 photoreduction guided by machine learning and first-principles calculation

Lijing Wanga,1, Tianyi Yanga,1, Bo Fengc, Xiangyu Xua, Yuying Shena, Zihan Lia, Arramel d, Jizhou Jiangb,*()   

  1. aHenan Engineering Center of New Energy Battery Materials, Henan D&A Engineering Center of Advanced Battery Materials, College of Chemistry and Chemical Engineering, Shangqiu Normal University, Shangqiu 476000, Henan, China
    bSchool of Environmental Ecology and Biological Engineering, Key Laboratory of Green Chemical Engineering Process of Ministry of Education, Engineering Research Center of Phosphorus Resources Development and Utilization of Ministry of Education, Novel Catalytic Materials of Hubei Engineering Research Center, Wuhan Institute of Technology, Wuhan 430205, Hubei, China
    cCollege of Chemistry, Baicheng Normal University, Baicheng 137000, Jilin, China
    dNano Center Indonesia, Jalan Raya PUSPIPTEK, South Tangerang, Banten 15314, Indonesia
  • Received:2023-09-20 Accepted:2023-10-20 Online:2023-11-18 Published:2023-11-15
  • Contact: *E-mail: 027wit@163.com (J. Jiang).
  • About author:1Contributed equally to this work.
  • Supported by:
    National Natural Science Foundation of China(62004143);Science and Technology project of Henan Province(232102240073);Key R&D Program of Hubei Province(2022BAA084)

Abstract:

Designing dual electron transfer channels to achieve efficient carrier separation and understanding the corresponding mechanisms for CO2 photoreduction is of great significance. However, it is still challenging to find desirable model to achieve optimal photocatalytic performance. Herein, first-principles calculations and machine learning were combined to predict an optimized microstructure with dual electron transfer channels. The results indicate that the construction of BiOBr-Bi-g-C3N4 heterojunction has optimal free energy (|ΔG|) for H2O dissociation and CO2 reduction. Besides, the double electron transfer channels and excellent Bi active site can localize the photoexcited carriers at the interlayers rather than randomly distributing. These localized carriers generate intriguing superposition states at a particular timescale that optimize the multi-electronic reaction kinetics pathway of CO2 reduction, resulting in a 4.7 and 3.1 fold increase compared to pristine Bi-BiOBr and Bi-g-C3N4 with single electron transfer pathway. Machine learning was further used to optimize the experimental parameters, and the photocatalytic mechanism was verified by combining first-principles calculation with comprehensive experimental characterizations. This work provides experimental and theoretical references for the accurate prediction, rational design and ingenious fabrication of high-performance photocatalytic materials.

Key words: Dual electron transfer channel, Photocatalytic CO2 reduction, Machine learning, First-principles calculations