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Issue 17, 2014
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Water oxidation electrocatalysis by a zeolitic imidazolate framework

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Abstract

The search for efficient water oxidation catalysts (WOCs) is of paramount importance in energy and environmental fields, but there exists no good non-noble catalyst that works under acidic and alkaline conditions. Intensive investigations have recently focused on cobalt based complex/solid catalysts. Here, we have introduced a new type of cobalt-based WOC made of metal–organic frameworks where the redox function of cobalt centres was modified by imidazolate linkers for facilitating the proton transfer process. This cobalt-containing zeolitic imidazolate framework (Co-ZIF-9) has been demonstrated for the first time to electrocatalyze the oxygen evolution reaction in a wide pH range. The catalyst was found by theoretical calculation to be capable of activating the water molecule via binding the OH-group to the metal sites with low activation barriers, while the eliminated proton was accepted by the nearby benzimidazolate motifs. This allows Co-ZIF-9 to work effectively for the electrochemical oxygen-evolution reaction.

Graphical abstract: Water oxidation electrocatalysis by a zeolitic imidazolate framework

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Supplementary files

Article information


Submitted
04 May 2014
Accepted
24 Jun 2014
First published
26 Jun 2014

Nanoscale, 2014,6, 9930-9934
Article type
Communication

Water oxidation electrocatalysis by a zeolitic imidazolate framework

S. Wang, Y. Hou, S. Lin and X. Wang, Nanoscale, 2014, 6, 9930
DOI: 10.1039/C4NR02399D

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