Reversible conversion between chemical and electrical energies catalyzed by Ru complexes aimed to construct sustainable society

Koji Tanaka, Tohru Wada, Etsuko Fujita, James T. Muckerman

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Reversible conversion between carbon dioxide and MeOH through six-electron redox reactions is one of the feasible pathway to construct renewable societies. Metal complexes that can oxide MeOH at potentials more negative than four-electron reduction of dioxygen are candidates for the electrode materials in fuel-cells. An aqua-Ru complex having a quinone ligand (pKa = 5.5) exists as the hydroxy analog (pKa ca. 11) in neutral water, and the latter is converted to an oxyl radical complex with a semiquinone ligand in highly basic solutions due to the electron flow from the deprotonated hydroxy group to the quinone ligand. On the other hand, an Ru-aminyl radical complex with quinone derived from the corresponding Ru-amine one works as an active catalyst in the electrochemical oxidation of MeOH in the presence of base at 0.3 V (vs. SCE). We will also discuss the electrochemical reduction of carbon dioxide catalyzed by Ru complexes in the symposium.

Original languageEnglish
Title of host publicationAmerican Chemical Society - 235th National Meeting, Abstracts of Scientific Papers
Publication statusPublished - Dec 1 2008
Event235th National Meeting of the American Chemical Society, ACS 2008 - New Orleans, LA, United States
Duration: Apr 6 2008Apr 10 2008

Publication series

NameACS National Meeting Book of Abstracts
ISSN (Print)0065-7727

Other

Other235th National Meeting of the American Chemical Society, ACS 2008
CountryUnited States
CityNew Orleans, LA
Period4/6/084/10/08

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ASJC Scopus subject areas

  • Chemistry(all)
  • Chemical Engineering(all)

Cite this

Tanaka, K., Wada, T., Fujita, E., & Muckerman, J. T. (2008). Reversible conversion between chemical and electrical energies catalyzed by Ru complexes aimed to construct sustainable society. In American Chemical Society - 235th National Meeting, Abstracts of Scientific Papers (ACS National Meeting Book of Abstracts).