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Issue 38, 2019
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Ligand assisted electrocatalytic water oxidation by a copper(ii) complex in neutral phosphate buffer

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Abstract

The electrocatalytic water oxidation activity of a copper(II) complex, 1, [Cu(L1H)(L1)(OH2)](ClO4), with a redox active aryl oxime ligand, L1H [L1H = 1-(pyridin-2-yl) ethanone oxime] has been investigated. Complex 1 shows a remarkably high turnover frequency of ∼100 s−1 in neutral phosphate buffer at about 675 mV overpotential with ∼94% faradaic efficiency. Electrochemical analysis suggests the involvement of a ligand moiety in a proton-coupled-electron-transfer (PCET) step during the catalytic cycle of complex 1, which in turn provides a route for accumulation of high oxidizing equivalents at the reaction center.

Graphical abstract: Ligand assisted electrocatalytic water oxidation by a copper(ii) complex in neutral phosphate buffer

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Supplementary files

Article information


Submitted
01 Feb 2019
Accepted
09 Apr 2019
First published
09 Apr 2019

Chem. Commun., 2019,55, 5483-5486
Article type
Communication

Ligand assisted electrocatalytic water oxidation by a copper(II) complex in neutral phosphate buffer

H. Kuilya, N. Alam, D. Sarma, D. Choudhury and A. Kalita, Chem. Commun., 2019, 55, 5483
DOI: 10.1039/C9CC00971J

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