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

Koji Tanaka, Tohru Wada, Etsuko Fujita, James 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 publicationACS National Meeting Book of Abstracts
Publication statusPublished - 2008
Event235th National Meeting of the American Chemical Society, ACS 2008 - New Orleans, LA, United States
Duration: Apr 6 2008Apr 10 2008

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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Ligands
Carbon Dioxide
Electrons
Carbon dioxide
Electrochemical oxidation
Redox reactions
Coordination Complexes
Metal complexes
Oxides
Amines
Fuel cells
Oxygen
Electrodes
Catalysts
Water
benzoquinone

ASJC Scopus subject areas

  • Chemistry(all)
  • Chemical Engineering(all)

Cite this

Reversible conversion between chemical and electrical energies catalyzed by Ru complexes aimed to construct sustainable society. / Tanaka, Koji; Wada, Tohru; Fujita, Etsuko; Muckerman, James.

ACS National Meeting Book of Abstracts. 2008.

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

Tanaka, K, Wada, T, Fujita, E & Muckerman, J 2008, Reversible conversion between chemical and electrical energies catalyzed by Ru complexes aimed to construct sustainable society. in ACS National Meeting Book of Abstracts. 235th National Meeting of the American Chemical Society, ACS 2008, New Orleans, LA, United States, 4/6/08.
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