Chemical Research in Chinese Universities ›› 2026, Vol. 42 ›› Issue (1): 373-380.doi: 10.1007/s40242-025-5155-0

• Research Articles • Previous Articles     Next Articles

Effective Coactivation of CO2 and CH4 Gases into HCOOH and CH3COOH Realized by Synergistic Effect in Double-atom Catalyst Based on 2D BC3N2

WANG Xiao, HE Chaozheng, ZHAO Chenxu   

  1. Institute of Environmental and Energy Catalysis, School of Materials Science and Chemical Engineering, Xi'an Technological University, Xi'an 710021, P. R. China
  • Received:2025-07-22 Online:2026-02-01 Published:2026-01-28
  • Contact: ZHAO Chenxu,E-mail:zhaochenxu@xatu.edu.cn;HE Chaozheng,E-mail:hecz2019@xatu.edu.cn E-mail:zhaochenxu@xatu.edu.cn;hecz2019@xatu.edu.cn
  • Supported by:
    This work was supported by the National Natural Science Foundation of China (No. 21603109), the Henan Joint Fund of the National Natural Science Foundation of China (No. U1404216), the Special Fund of Tianshui Normal University, China (No. CXJ2020-08), the Scientific Research Program Funded by Shaanxi Provincial Education Department, China (No. 20JK0676), and the Natural Science Basic Research Program of Shanxi Province, China (Nos. 2022JQ-108, 2022JQ-096).

Abstract: We herein designed a double-atom catalyst based on 2D BC3N2 and calculated the properties of CO2/CH4 coactivation via density functional theory. PtM@2D-BC3N2 catalysts (M denotes Cr, Mo, Ti, V, and W) are first screened based on high binding strength of metal atoms and CH4 caputre ability. In these candidates, the systems with M in IVB and VB subgroups have unfavorable adsorption oritation of *CH3COO (*HCOO) for *CO2-*CH3 (*CO2-*H) combination. In comparison, the systems with M in VIB subgroup are favourable and the reactivity of *CO2-*CH3 (*CO2-*H) combination is decreased with increasing period. Finally, the PtCr@2D-BC3N2 is screened as the optimal catalyst. There exists a synergistic effect between Pt and Cr sites in PtCr@2D-BC3N2: the CH4 can be effectively adsorbed on Cr site and will further be dissociated on Pt site with high reactivity. HCOOH can be produced in the temperature region of 34.84—66.85 ℃. While at temperatures higher than 66.85 ℃, the selectivity of CH3COOH production is significantly higher than that of HCOOH due to the larger rate constant and ratio of atom utilization. Our study has not only clarified the potential mechanism of CO2/CH4 coactivation for theoretical works but also provided promising candidates for experimental works.

Key words: CO2/CH4 coactivation, Double-atom catalyst, 2D BC3N2 substrate, CH3COOH production