Journal
APPLIED SURFACE SCIENCE
Volume 448, Issue -, Pages 9-15Publisher
ELSEVIER
DOI: 10.1016/j.apsusc.2018.04.080
Keywords
Cobalt sulfide; Oxygen evolution reaction; Iron doping; Water splitting; Electrocatalyst
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Funding
- National Natural Science Foundation of China [61301026, 61474096, 21101135]
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Earth-abundant transition metal sulfide eletrocatalysts for oxygen evolution reaction (OER) with compelling catalytic performance hold a key to clean and renewable energy conversion. Herein, we report a one-step solvothermal method to synthesize iron-doped cobalt sulfide (CoFeS) nanoplates. A highly efficient OER catalytic performance with a low overpotential of 290 mV, small Tafel slope of 52.6 mV dec (1) and long-term operational stability is achieved from the CoFeS nanostructures with an optimized Fe/Co ratio. The enhanced catalytic activity is attributed to the high electric conductivity of CoFeS that accelerating charge transfer during the reaction, and Fe doping that changing the local Co-S environments toward a moderate absorption energy to the reaction intermediates. (C) 2018 Published by Elsevier B.V.
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