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Issue 2, 2011

Highly active cobalt phosphate and borate based oxygen evolving catalysts operating in neutral and natural waters

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Abstract

A high surface area electrode is functionalized with cobalt-based oxygen evolving catalysts (Co-OEC = electrodeposited from pH 7 phosphate, Pi, pH 8.5 methylphosphonate, MePi, and pH 9.2 borate electrolyte, Bi). Co-OEC prepared from MePi and operated in Pi and Bi achieves a current density of 100 mA cm−2 for water oxidation at 442 and 363 mV overpotential, respectively. The catalyst retains activity in near-neutral pH buffered electrolyte in natural waters such as those from the Charles River (Cambridge, MA) and seawater (Woods Hole, MA). The efficacy and ease of operation of anodes functionalized with Co-OEC at appreciable current density together with its ability to operate in near neutral pH buffered natural water sources bodes well for the translation of this catalyst to a viable renewable energy storage technology.

Graphical abstract: Highly active cobalt phosphate and borate based oxygen evolving catalysts operating in neutral and natural waters

  • This article is part of the themed collection: Solar energy

Supplementary files

Article information


Submitted
03 Oct 2010
Accepted
26 Oct 2010
First published
02 Dec 2010

Energy Environ. Sci., 2011,4, 499-504
Article type
Paper

Highly active cobalt phosphate and borate based oxygen evolving catalysts operating in neutral and natural waters

A. J. Esswein, Y. Surendranath, S. Y. Reece and D. G. Nocera, Energy Environ. Sci., 2011, 4, 499 DOI: 10.1039/C0EE00518E

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