Electrocatalytic O2 evolution from water at an ITO electrode modified with[Ru(terpy){4,4′-(CH2PO3H 2)2-2,2′-bpy}(OH2)]2+: Evidence for a unimolecular pathway

Josaku Kiyota, Junpei Yokoyama, Masaki Yoshida, Shigeyuki Masaoka, Ken Sakai

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Abstract

An ITO (indium tin oxide) electrode modified with [Ru(terpy)-{4,4′ CH2PO3H2)2-2,2′-bpy }(OH 2)]2+ was prepared to gain insight into the mechanism of O2 evolution from water catalyzed by a series of mononuclear aquaruthenium complexes, such as [Ru-(terpy)(bpy)(OH2)]2+. The modified ITO electrode showed a clear decrease in overpotential for O 2 evolution (1.35 V in an aqueous 0.1M Na2SO 4/H2SO4 solution, pH 4.0), indicating that the O2 evolution proceeds in a unimolecular fashion without having any intermolecular associations.

Original languageEnglish
Pages (from-to)1146-1148
Number of pages3
JournalChemistry Letters
Volume39
Issue number11
DOIs
Publication statusPublished - Nov 24 2010

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Electrodes
Water
indium tin oxide

All Science Journal Classification (ASJC) codes

  • Chemistry(all)

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Electrocatalytic O2 evolution from water at an ITO electrode modified with[Ru(terpy){4,4′-(CH2PO3H 2)2-2,2′-bpy}(OH2)]2+ : Evidence for a unimolecular pathway. / Kiyota, Josaku; Yokoyama, Junpei; Yoshida, Masaki; Masaoka, Shigeyuki; Sakai, Ken.

In: Chemistry Letters, Vol. 39, No. 11, 24.11.2010, p. 1146-1148.

Research output: Contribution to journalArticle

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