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Issue 43, 2019
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Base-enhanced electrochemical water oxidation by a nickel complex in neutral aqueous solution

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Abstract

A nickel complex, [Ni(TMC)(CH3CN)](NO3)2 (TMC = 1,4,8,11-tetramethyl-1,4,8,11-tetraazacyclotetradecane, 1), was found to be an efficient water oxidation catalyst in pH 7 phosphate buffer. It exhibits pseudo first order kinetics in electrochemical water oxidation with a catalytic rate of 9.95 s−1, the highest rate for nickel WOCs at neutral pH. Complex 1 also shows superior catalytic activity with respect to that of a copper analogue, [Cu(TMC)(H2O)](NO3)2, under the same conditions. Kinetic studies indicate a more than one order of magnitude rate acceleration with the added bases due to an atom-proton transfer (APT) pathway.

Graphical abstract: Base-enhanced electrochemical water oxidation by a nickel complex in neutral aqueous solution

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Article information


Submitted
07 Mar 2019
Accepted
26 Apr 2019
First published
27 Apr 2019

Chem. Commun., 2019,55, 6122-6125
Article type
Communication

Base-enhanced electrochemical water oxidation by a nickel complex in neutral aqueous solution

L. Zhang, F. Yu, Y. Shi, F. Li and H. Li, Chem. Commun., 2019, 55, 6122
DOI: 10.1039/C9CC01865D

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