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Electrochemical reduction of carbon dioxide catalyzed by cofacial dinuclear metalloporphyrin
Author(s) -
Enoki Osamu,
Imaoka Takane,
Yamamoto Kimihisa
Publication year - 2003
Publication title -
macromolecular symposia
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.257
H-Index - 76
eISSN - 1521-3900
pISSN - 1022-1360
DOI - 10.1002/masy.200351413
Subject(s) - porphyrin , electrochemistry , catalysis , cobalt , cationic polymerization , chemistry , redox , electrochemical reduction of carbon dioxide , photochemistry , carbon dioxide , inorganic chemistry , polymer chemistry , carbon monoxide , organic chemistry , electrode
Cofacial dinuclear metalloporphyrins exhibited a catalytic activity for the electrochemical reduction of carbon dioxide. The cofacial dinuclear porphyrin was automatically generated by mixing a cationic cobalt porphyrin (CoTMPyP) and an anionic metalloporphyrin (MTPPS) in solution. The redox system of this complex was examined by electrochemical methods. According to the cyclic voltammogram, the catalytic active species was generated at −1.8V vs. Ag/Ag + , which was considered to be a monovalent cobalt porphyrin, Co(I)TMPyP. The catalytic activity of the dinuclear complex was two times greater than that of the mononuclear one because the anionic porphyrin acted as an electron mediator.