Lamellar structured CoSe2 nanosheets directly arrayed on Ti plate as an efficient electrochemical catalyst for hydrogen evolution
By Xiao, Huaqing; Wang, Shutao; Wang, Cong; Li, Yanyu; Zhang, Hongrong; Wang, Zhaojie; Zhou, Yan; An, Changhua; Zhang, Jun
Published in Electrochimica Acta
NULL
2016
Abstract
Abstract Splitting water by electrochemical reactions is considered to be the most promising strategy to create hydrogen. Herein, an efficient hydrogen evolution cathode was developed by in-situ growth of lamellar structured cobalt diselenide (CoSe2) nanosheets on the surface of commercial titanium (Ti) plate (CoSe2NS@Ti) in the first time. Both {SEM} images and {XRD} data confirmed that the Ti plate is homogeneously coated by few stacking layers of lamellar structured CoSe2, which could provide more active sites for hydrogen evolution reaction (HER) with the thickness about 20 nm. This catalytic cathode shows exceptionally high activity for hydrogen evolution with 152 mV overpotential to afford a current density of 10 mA cm?2 and a high exchange current density of 5.01
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