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Photochemical Reduction of Low Concentrations of CO 2 in a Porous Coordination Polymer with a Ruthenium(II)–CO Complex
Author(s) -
Kajiwara Takashi,
Fujii Machiko,
Tsujimoto Masahiko,
Kobayashi Katsuaki,
Higuchi Masakazu,
Tanaka Koji,
Kitagawa Susumu
Publication year - 2016
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.201508941
Subject(s) - catalysis , ruthenium , adsorption , chemistry , composite number , polymer , homogeneous , porosity , inorganic chemistry , photochemistry , chemical engineering , materials science , organic chemistry , physics , engineering , composite material , thermodynamics
Direct use of low pressures of CO 2 as a C1 source without concentration from gas mixtures is of great interest from an energy‐saving viewpoint. Porous heterogeneous catalysts containing both adsorption and catalytically active sites are promising candidates for such applications. Here, we report a porous coordination polymer (PCP)‐based catalyst, PCP‐Ru II composite, bearing a Ru II ‐CO complex active for CO 2 reduction. The PCP‐Ru II composite showed improved CO 2 adsorption behavior at ambient temperature. In the photochemical reduction of CO 2 the PCP‐Ru II composite produced CO, HCOOH, and H 2 . Catalytic activity was comparable with the corresponding homogeneous Ru II catalyst and ranks among the highest of known PCP‐based catalysts. Furthermore, catalytic activity was maintained even under a 5 % CO 2 /Ar gas mixture, revealing a synergistic effect between the adsorption and catalytically active sites within the PCP‐Ru II composite.