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Issue 2, 2016
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A nanoporous oxygen evolution catalyst synthesized by selective electrochemical etching of perovskite hydroxide CoSn(OH)6 nanocubes

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Abstract

The development of efficient and Earth-abundant oxygen evolution reaction (OER) catalysts is essential for the generation of renewable hydrogen. The synthesis of nanoporous and high-surface-area catalysts remains challenging. Herein, we show that large nanocubes of perovskite hydroxide CoSn(OH)6 can be electrochemically etched to form a highly active OER catalyst, reaching 10 mA cm−2 at an overpotential (η) of only 274 mV. The good catalytic activity was attributed to the formation of hierarchical nanoporous CoOOH particles, which were created by selective dissolution of Sn hydroxides. Crystal defects of oxygen vacancies appear to be important for the formation of active catalysts.

Graphical abstract: A nanoporous oxygen evolution catalyst synthesized by selective electrochemical etching of perovskite hydroxide CoSn(OH)6 nanocubes

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Article information


Submitted
12 Nov 2015
Accepted
23 Dec 2015
First published
24 Dec 2015

Energy Environ. Sci., 2016,9, 473-477
Article type
Communication

A nanoporous oxygen evolution catalyst synthesized by selective electrochemical etching of perovskite hydroxide CoSn(OH)6 nanocubes

F. Song, K. Schenk and X. Hu, Energy Environ. Sci., 2016, 9, 473
DOI: 10.1039/C5EE03453A

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