Electrocatalytic Water Oxidation by a Tetranuclear Copper Complex

Vijayendran K K Praneeth; Mio Kondo; Pei Meng Woi; Masaya Okamura; Shigeyuki Masaoka

doi:10.1002/cplu.201600322

Electrocatalytic Water Oxidation by a Tetranuclear Copper Complex

Chempluschem. 2016 Oct;81(10):1123-1128. doi: 10.1002/cplu.201600322.

Authors

Vijayendran K K Praneeth¹, Mio Kondo^{1

2

3}, Pei Meng Woi^{1

4}, Masaya Okamura^{1

5}, Shigeyuki Masaoka^{1

2}

Affiliations

¹ Institute for Molecular Science (IMS), 5-1 Higashiyama, Myodaiji, Okazaki, Aichi, 444-8787, Japan.
² Research Center of Integrative Molecular Systems (CIMoS), Institute for Molecular Science (IMS), 38 Nishigo-naka, Myodaiji, Okazaki, Aichi, 444-8585, Japan.
³ ACT-C, Japan Science and Technology Agency (JST), 4-1-8 Honcho, Kawaguchi, Saitama, 332-0012, Japan.
⁴ Department of Chemistry, Faculty of Science, University of Malaya, Kuala Lumpur, 50603, Malaysia.
⁵ Graduate School of Science, Nagoya University, Furo-cho, Chikusa-ku, Nagoya, 464-8602, Japan.

PMID: 31964085
DOI: 10.1002/cplu.201600322

Abstract

A novel tetranuclear copper-based water oxidation catalyst was designed and synthesized by using a new multinucleating ligand containing two proton dissociation sites, 1,3-bis(6-hydroxy-2-pyridyl)-1H-pyrazole. The copper complex showed electrocatalytic activity for water oxidation reactions under aqueous basic conditions (pH 12.5) with an overpotential of approximately 500 mV. UV/Vis absorption and energy-dispersive X-ray (EDX) spectroscopic techniques coupled with electrochemical analyses of the catalyst system strongly suggest that the tetranuclear copper complex works as a homogeneous system under the conditions used. The results described here demonstrate the utility of a discrete tetranuclear copper complex in water oxidation reactions.

Keywords: catalysis; copper; homogeneous catalysis; multinuclear complexes; water splitting.

Abstract

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