期刊
ADVANCED MATERIALS
卷 29, 期 41, 页码 -出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/adma.201703870
关键词
diselenides; electrocatalysis; nanocages; oxygen evolution reaction; Prussian-blue analog
类别
资金
- National Research Foundation (NRF) of Singapore [NRF-NRFI2016-04]
Exploring effective electrocatalysts is a crucial requirement for boosting the efficiency of water splitting to obtain clean fuels. Here, a self-templating strategy is reported to synthesize Ni-Fe mixed diselenide cubic nanocages for the electrocatalytic oxygen evolution reaction (OER). The diselenide nanocages are derived from corresponding Prussian-blue analog nanocages, which are first obtained by treating the nanocube precursor with a site-selective ammonia etchant. The resulting Ni-Fe mixed diselenide nanocages perform as a superior OER electrocatalyst, which affords a current density of 10 mA cm(-2) at a small overpotential of 240 mV; a high current density, mass activity, and turnover frequency of 100 mA cm(-2), 1000 A g(-1), and 0.58 s(-1), respectively, at the overpotential of 270 mV; a Tafel slope as small as 24 mV dec(-1); and excellent stability in alkaline medium.
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