Journal
CHEMPLUSCHEM
Volume 81, Issue 10, Pages 1123-1128Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/cplu.201600322
Keywords
catalysis; copper; homogeneous catalysis; multinuclear complexes; water splitting
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Funding
- Japan Society for the Promotion of Science [16H04125, 15H05480, 26620160]
- ACT-C, JST
- IMS Internship Program Award
- FRGS by the Ministry of Higher Education Malaysia [FP051-2014A]
- [15H00889]
- Grants-in-Aid for Scientific Research [15H00889, 26620160, 16H07420, 15H05480, 25708011, 16H04125] Funding Source: KAKEN
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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 (pH12.5) with an overpotential of approximately 500mV. 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.
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