Developments of Oxygen Evolving Complex Catalysts Aiming for Energy Conversion

• Project/Area Number: 23550084
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Inorganic chemistry
• Research Institution: Rikkyo University
• Principal Investigator: WADA Tohru 立教大学, 理学部, 准教授 (30342637)
• Project Period (FY): 2011 – 2013
• Project Status: Completed (Fiscal Year 2013)
• Budget Amount: ¥5,330,000 (Direct Cost: ¥4,100,000、Indirect Cost: ¥1,230,000); Fiscal Year 2013: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000); Fiscal Year 2012: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000); Fiscal Year 2011: ¥2,990,000 (Direct Cost: ¥2,300,000、Indirect Cost: ¥690,000)
• Keywords: 水の酸化反応 / 錯体 / 触媒 / エネルギー変換 / ルテニウム錯体 / ルテニウム

Research Abstract

Four-electron water oxidation is a necessary for realization of artificial photosynthesis. In this research, we developed mono- and binuclear complex catalysts for the purpose of four-electron water oxidation near the equilibrium potential. We have synthesized the mono-ruthenium complexes having a strong electron donor ligand, such as tetramethylethylenediamine (tmen) or dipyridylbenzene (dpb). These mono-ruthenium complexes have been oxidized at lower potential compared with that of the corresponding ruthenium complex having the electron acceptor ligand. In fact, these complexes have catalyzed water oxidation in the presence of [Ru(boy)]3+ (bpy = bipyridine) as an oxidant. Furthermore, we synthesized dinuclear ruthenium complex with a phosphate group in order to develop the hybrid catalyst of metal-oxide and metal complex. Electrochemical measurements have revealed that the dinuclear ruthenium complex modified on ITO electrode shows reversible redox reaction.

Research Products

• [Journal Article] Catalytic Four-Electron Oxidation of Water via Intramolecular Coupling of the Oxo Ligands of Bis(ruthenium-bipyridine) Complex (2012)
  • Author(s): T.Wada, H.Ohtsu, K.Tanaka
  • Journal Title: Chem.Eur.J. Volume: 18 Issue: 8 Pages: 2374-2381
  • DOI: 10.1002/chem.201102236
  • Peer Reviewed
• [Journal Article] Substituents dependent capability of bis(ruthenium-dioxolene-terpyridine) complexes toward water oxidation (2011)
  • Author(s): Tohru Wada, James T. Muckerman, Etsuko Fujita, Koji Tanaka
  • Journal Title: Dalton Transactions Volume: 40 Issue: 10 Pages: 2225-2223
  • DOI: 10.1039/c0dt00977f
  • Peer Reviewed
• [Presentation] ルテニウム-炭素結合を有するルテニウム-ポリピリジル錯体による水の酸化反応 (2013)
  • Author(s): 平出尚秀・宮里裕二・和田 亨
  • Organizer: 錯体化学会第６３回討論会
  • Place of Presentation: 琉球大学
• [Presentation] ルテニウム-炭素結合を有するルテニウム-ポリピリジル錯体による水の酸化反応 (2012)
  • Author(s): 平出尚秀, 宮里裕二, 和田 亨
  • Organizer: 錯体化学会第63回討論会
  • Place of Presentation: 琉球大学
• [Presentation] 酸化還元活性な架橋配位子を有する二核ルテニウム錯体による水の酸化反応 (2012)
  • Author(s): 望月太郎, 宮里裕二, 和田 亨
  • Organizer: 錯体化学会第62回討論会
  • Place of Presentation: 富山大学
• [Presentation] 酸化還元活性な架橋配位子を有する二核ルテニウム錯体による水の酸化反応 (2012)
  • Author(s): 望月太郎 宮里裕二 和田亨
  • Organizer: 第６２回錯体化学会討論会
  • Place of Presentation: 富山大学（富山県）
• [Book] Water Oxidation by Ruthenium Catalysts with Non-Innocent Ligands, Molecular Water Oxidation Catalysts(edited by Antoni Lobet) (2014)
  • Author(s): Tohru Wada, Koji Tanaka, Etsuko Fujita, James T. Muckerman
  • Total Pages: 304
  • Publisher: Wiley
• [Book] Molecular Water Oxidation Catalysis (2014)
  • Author(s): Gary W. Brudvig, Jennifer L. DuBois, Etsuko Fujita, Craig L. Hill, Antoni Llobet, James M. Mayer, Neal D. McDaniel, James T. Muckerman, Licheng Sun, Koji Tanaka, Tohru Wada, Christopher R. Waidmann
  • Total Pages: 304
  • Publisher: Wiley