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Updated: Sep 10, 2025
Synthesis of Metal Nanoparticles Supported on Carbon Nanotube with Doped Co and N Atoms and its Catalytic Applications in Hydrogen Production
Published on: December 6, 2021
Hydrogen Atom Transfer-Mediated N-Heterocycles Dehydrogenation Coupled with the CO2 Photoreduction to Syngas
Yong-Kang Zhang1, An-Guo Wu1, Liang-Nian He1
1State Key Laboratory and Institute of Elemento-Organic Chemistry, Frontiers Science Center for New Organic Matter, College of Chemistry, Nankai University, Tianjin 300071, P. R. China.
Abstract:
Homogeneous photocatalytic organic oxidation coupled with CO2 reduction remains challenging due to the susceptibility to a back electron transfer scenario. Herein, a pyridinethiol iron-catalyzed system is developed to achieve N-heterocycles dehydrogenation coupled with CO2 photoreduction to syngas. The system is comprised of 2,4,5,6-tetrakis(diphenylamino)isophthalonitrile (4DPAIPN) photoredox catalysts, earth-abundant iron catalysts, and pyridinethiol organocatalysts, and the employment of pyridinethiol both as a hydrogen atom transfer (HAT) catalyst to promote N-heterocycles dehydrogenation and as an effective ligand for CO2 reduction is the key to realizing the coupled redox reaction. Experimental and theoretical calculation results demonstrate the positive correlation between the reactivity and the S-H bond dissociation enthalpy (BDE) as well as the radical polarity (ω) parameter, gaining deep insights into understanding and designing the coupled reaction.
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