Efficient Visible-Light-Driven CO 2 Reduction by a Cobalt Molecular Catalyst Covalently Linked to Mesoporous Carbon Nitride

Bing Ma (1) , Gui Chen (2) , Claire Fave (1) , Lingjing Chen (2) , Ryo Kuriki (3) , Kazuhiko Maeda (3) , Osamu Ishitani (3) , Tai-Chu Lau (4) , Julien Bonin (1) , Marc Robert (1)

1 LEM (UMR_7591) - Laboratoire d'Electrochimie Moléculaire
2 Dongguan University of Technology
3 TITECH - Tokyo Institute of Technology [Tokyo]
4 CUHK - City University of Hong Kong [Hong Kong]

Achieving visible-light-driven carbon dioxide reduction with high selectivity control and durability while using only earth abundant elements requires new strategies. Hybrid catalytic material was prepared upon covalent grafting a Co–quaterpyridine molecular complex to semiconductive mesoporous graphitic carbon nitride (mpg-C3N4) through an amide linkage. The molecular material was characterized by various spectroscopic techniques, including XPS, IR, and impedance spectroscopy. It proved to be a selective catalyst for CO production in acetonitrile using a solar simulator with a high 98% selectivity, while being remarkably robust since no degradation was observed after 4 days of irradiation (ca. 500 catalytic cycles). This unique combination of a selective molecular catalyst with a simple and robust semiconductive material opens new pathways for CO2 catalytic light-driven reduction.

Domains: Chemical Sciences; Catalysis; Chemical Sciences; Inorganic chemistry

Bing Ma, Gui Chen, Claire Fave, Lingjing Chen, Ryo Kuriki, et al.. Efficient Visible-Light-Driven CO 2 Reduction by a Cobalt Molecular Catalyst Covalently Linked to Mesoporous Carbon Nitride. Journal of the American Chemical Society, 2020, 142 (13), pp.6188-6195. ⟨10.1021/jacs.9b13930⟩. ⟨hal-02954112⟩