Metal-free C(CN)_(3)cooperated with Co–Ti dual sites in bimetallic CoTi-MOF as a tandem photocatalyst for highly efficient C_(2)H_(4)productionOA
The photocatalytic reduction of carbon dioxide(CO_(2))into high-value C_(2+)hydrocarbons represents a sustainable pathway to alleviate energy shortages and reduce atmospheric CO_(2)levels.In this study,a unique tandem photocatalyst(CoTi-CN)is constructed by integrating bimetallic CoTi-MOF with metal-free half-metallic C(CN)_(3).This composite demonstrates markedly enhanced activity and selectivity in the photocatalytic CO_(2)reduction to ethylene(C_(2)H_(4)),achieving a C_(2)H_(4)selectivity of 36.8%and a generation yield of 31.3μmol g^(-1)over 5 h.Density functional theory(DFT)calculations combined with in situ diffuse reflectance infrared Fourier transform spectroscopy(DRIFTS)analysis reveal that C(CN)_(3)acts as an efficient CO_(2)to CO converter,while CoTi-MOF favors the adsorption and C-C coupling of^(*)CO intermediates.The spatially decoupled CO generation and C-C coupling processes lead to optimized intermediate coverage and reduced energy barriers,resulting in superior selectivity toward multi-carbon products.This work opens new horizons for the design of tandem photocatalysts that combine half-metallic catalysts with bimetallic MOFs,achieving a significant enhancement in the activity and selectivity of photocatalytic C_(2)H_(4)production.
Lijun Xiong;Dandan Zhu;Chenglong Qiu;Weihong Zeng;Mingshi Xu;Shanshan Wang;Yong Yang
School of Biomedical and Pharmaceutical Engineering,Hefei Institute of Technology,Hefei,238076,ChinaSchool of Chemistry and Chemical Engineering,Nanjing University of Science and Technology,Nanjing,210094,ChinaSchool of Chemistry and Chemical Engineering,Nanjing University of Science and Technology,Nanjing,210094,ChinaSchool of Biomedical and Pharmaceutical Engineering,Hefei Institute of Technology,Hefei,238076,ChinaSchool of Biomedical and Pharmaceutical Engineering,Hefei Institute of Technology,Hefei,238076,ChinaSchool of Biomedical and Pharmaceutical Engineering,Hefei Institute of Technology,Hefei,238076,ChinaSchool of Chemistry and Chemical Engineering,Nanjing University of Science and Technology,Nanjing,210094,China
化学化工
Tandem catalystBimetallic CoTi-MOFHalf-metallic C(CN)_(3)Photocatalytic CO_(2)reductionC-C coupling
《Green Energy & Environment》 2026 (4)
P.1135-1145,11
supported by the National Natural Science Foundation of China(51303083)the National Natural Science Foundation of China for Excellent Young Scholars(51922050)the Natural Science Foundation of Jiangsu Province(BK20191293)the Fundamental Research Funds for the Central Universities(30920021123).
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