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A Purely Inorganic Quasi‐Keggin Polyoxometalate for Photocatalytic Conversion of Carbon Dioxide to Carbon Monoxide
Author(s) -
Liu XiaoMei,
Kang RunKun,
Wang JiLei,
Li JiaNian,
Chen QiaoLing,
Xu Yan
Publication year - 2021
Publication title -
chempluschem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.801
H-Index - 61
ISSN - 2192-6506
DOI - 10.1002/cplu.202100260
Subject(s) - polyoxometalate , photocatalysis , carbon monoxide , thermogravimetric analysis , catalysis , hydrothermal circulation , selectivity , chemistry , cluster (spacecraft) , hydrothermal synthesis , keggin structure , carbon fibers , inorganic chemistry , materials science , chemical engineering , organic chemistry , computer science , engineering , programming language , composite number , composite material
A pure inorganic cluster, H 47 Na 2 Co 4 Mo 24 (PO 4 ) 11 O 72 ⋅ 15H 2 O (denoted as { Co 4 Mo 24 }), has been successfully synthesized by hydrothermal method. Notably, the assembly of a central {Co 2 PO 4 } tetrahedron and four peripheral {Co[P 4 Mo 6 ]} fragments gives rise to a rare “quasi‐Keggin” structure of { Co 4 Mo 24 }, in which Co linkers continue to bridge adjacent substructures, resulting in the generation of 3D framework with large cavities. Benefitting from the combination of strong reductive {P 4 Mo 6 } units and Co active centers, the photocatalytic system with { Co 4 Mo 24 } as heterogeneous catalyst exhibits excellent activity for CO 2 conversion to CO, offering the CO formation rate of 1848.3 μ mol g −1 h −1 with high selectivity of 97.0 %. Besides, thermogravimetric and X‐ray diffraction analysis confirm that { Co 4 Mo 24 } can maintain stable during the photocatalytic reaction process.