High catalytic activity of heteropolynuclear cyanide complexes containing cobalt and platinum ions: Visible-light driven water oxidation

Yusuke Yamada, Kohei Oyama, Rachel Gates, Shunichi Fukuzumi

Research output: Contribution to journalArticlepeer-review

59 Scopus citations

Abstract

A near-stoichiometric amount of O2 was evolved as observed in the visible-light irradiation of an aqueous buffer (pH 8) containing [RuII(2,2'-bipyridine)3] as a photosensitizer, Na2S2O8 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 CoIII or PtIV 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. A platinum assist: A near-stoichiometric amount of O2 was evolved as observed in the visible-light irradiation of an aqueous buffer (pH 8) containing [RuII(2,2'-bipyridine)3] as a photosensitizer, Na2S2O8 as a sacrificial electron acceptor, and a heteropolynuclear cyanide complex as a water-oxidation catalyst. The synergistic effect between the Co and Pt ions was confirmed to facilitate the water-oxidation catalysis by the heteropolynuclear complex.

Original languageEnglish
Pages (from-to)5613-5617
Number of pages5
JournalAngewandte Chemie - International Edition
Volume54
Issue number19
DOIs
StatePublished - 4 May 2015

Bibliographical note

Publisher Copyright:
© 2015 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.

Keywords

  • cobalt
  • heterogeneous catalysis
  • platinum
  • structure elucidation
  • water oxidation

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