Visible-Light-Driven CO2 Reduction by Mesoporous Carbon Nitride Modified with Polymeric Cobalt Phthalocyanine.


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Authors
Roy, Souvik 
Abstract

The integration of molecular catalysts with low-cost, solid light absorbers presents a promising strategy to construct catalysts for the generation of solar fuels. Here, we report a photocatalyst for CO2 reduction that consists of a polymeric cobalt phthalocyanine catalyst (CoPPc) coupled with mesoporous carbon nitride (mpg-CNx ) as the photosensitizer. This precious-metal-free hybrid catalyst selectively converts CO2 to CO in organic solvents under UV/Vis light (AM 1.5G, 100 mW cm-2 , λ>300 nm) with a cobalt-based turnover number of 90 for CO after 60 h. Notably, the photocatalyst retains 60 % CO evolution activity under visible light irradiation (λ>400 nm) and displays moderate water tolerance. The in situ polymerization of the phthalocyanine allows control of catalyst loading and is key for achieving photocatalytic CO2 conversion.

Description
Keywords
CO2 reduction, carbon nitride, catalyst immobilization, cobalt phthalocyanine, photocatalysis
Journal Title
Angew Chem Int Ed Engl
Conference Name
Journal ISSN
1433-7851
1521-3773
Volume Title
58
Publisher
Wiley
Sponsorship
Christian Doppler Forschungsgesellschaft (unknown)
European Commission Horizon 2020 (H2020) Marie Sk?odowska-Curie actions (745604)
Engineering and Physical Sciences Research Council (EP/P030467/1)