Jump to main content
Jump to site search

Issue 32, 2016
Previous Article Next Article

Electrocatalytic water oxidation using a chair-like tetranuclear copper(ii) complex in a neutral aqueous solution

Author affiliations

Abstract

The development of viable molecular water oxidation catalysts is an important issue in the conversion of electricity or solar fuel into chemical fuels via water splitting, and copper complexes have become promising candidates for catalyzing water oxidation because of their low cost, well-defined redox properties and relatively high reactivity. Herein, we describe the first tetranuclear Cu(II)-based water oxidation catalyst: [Cu4(bpy)42-OH)23-OH)2(H2O)2]2+. The complex comprises a chair-like Cu4O4 core with aqua and bridging μ-hydroxo ligands, and the multinuclear core is expected to be advantageous for promoting multi-electron transfer. In pH 7.0 phosphate buffer, the complex shows as being hydrolytically stable and a relatively low overpotential of ca. 730 mV is obtained according to a cyclic voltammetry experiment. Bulk electrolysis measurements at 1.80 V vs. a normal hydrogen electrode provided a stable current density of 0.78 mA cm−2 and the current persists for at least 10 h. A Faradaic efficiency of nearly 98% is achieved. Importantly, the electrochemical data support that this tetranuclear complex works as a robust homogeneous water oxidation catalyst.

Graphical abstract: Electrocatalytic water oxidation using a chair-like tetranuclear copper(ii) complex in a neutral aqueous solution

Back to tab navigation

Supplementary files

Article information


Submitted
13 May 2016
Accepted
11 Jul 2016
First published
11 Jul 2016

Dalton Trans., 2016,45, 12685-12690
Article type
Paper

Electrocatalytic water oxidation using a chair-like tetranuclear copper(II) complex in a neutral aqueous solution

T. Li and Y. Zheng, Dalton Trans., 2016, 45, 12685
DOI: 10.1039/C6DT01891B

Social activity

Search articles by author

Spotlight

Advertisements