title: High catalytic activity of heteropolynuclear cyanide complexes containing cobalt and platinum ions: visible-light driven water oxidation.
abstract: A near-stoichiometric amount of O2 was evolved as observed in the visible-light irradiation of an aqueous buffer (pH 8) containing [Ru(II) (2,2'-bipyridine)3 ] as a photosensitizer, Na2 S2 O8 as a sacrificial electron acceptor, and a heteropolynuclear cyanide complex as a water-oxidation catalyst. The heteropolynuclear cyanide complexes exhibited higher catalytic activity than a polynuclear cyanide complex containing only Co(III) or Pt(IV) ions as C-bound metal ions. The origin of the synergistic effect between Co and Pt ions is discussed in relation to electronic and local atomic structures of the complexes.
authors: Department of Material and Life Science, Graduate School of Engineering, Osaka University, 2-1 Yamada-oka, Suita, Osaka 565-0871 (Japan) http://www-etchem.mls.eng.osaka-u.ac.jp/. yamada@chem.eng.osaka-u.ac.jp.
authors: Yusuke
authors: Y
authors: Yamada
authors: Kohei
authors: K
authors: Oyama
authors: Rachel
authors: R
authors: Gates
authors: Shunichi
authors: S
authors: Fukuzumi
mesh_terms: D002384:Catalysis; D003035:Cobalt / Q000737:chemistry*; D003486:Cyanides / Q000737:chemistry*; D007477:Ions / Q000737:chemistry; D008027:Light; D009942:Organometallic Compounds / Q000138:chemical synthesis / Q000737:chemistry*; D010084:Oxidation-Reduction; D010984:Platinum / Q000737:chemistry*; D011108:Polymers / Q000737:chemistry*; D014867:Water / Q000737:chemistry*
chemical_list: D003486:Cyanides; D007477:Ions; D009942:Organometallic Compounds; D011108:Polymers; D014867:Water; D003035:Cobalt; D010984:Platinum
keywords: cobalt; heterogeneous catalysis; platinum; structure elucidation; water oxidation