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Visible‐Light‐Driven CO 2 Reduction by Mesoporous Carbon Nitride Modified with Polymeric Cobalt Phthalocyanine
Author(s) -
Roy Souvik,
Reisner Erwin
Publication year - 2019
Publication title -
angewandte chemie international edition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 1433-7851
DOI - 10.1002/anie.201907082
Subject(s) - phthalocyanine , photocatalysis , cobalt , catalysis , mesoporous material , materials science , carbon nitride , visible spectrum , photochemistry , carbon fibers , nitride , polymerization , chemical engineering , nanotechnology , chemistry , organic chemistry , polymer , optoelectronics , composite number , composite material , layer (electronics) , engineering , metallurgy
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 CO 2 reduction that consists of a polymeric cobalt phthalocyanine catalyst (CoPPc) coupled with mesoporous carbon nitride (mpg‐CN x ) as the photosensitizer. This precious‐metal‐free hybrid catalyst selectively converts CO 2 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 CO 2 conversion.