Journal
APPLIED SURFACE SCIENCE
Volume 413, Issue -, Pages 360-365Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.apsusc.2017.03.285
Keywords
Hydrogen evolution; Seawater splitting; Energy conversion; Electrocatalysts; Alloy electrodes
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Funding
- Key research and development Plan Project of Shandong Province [2015GGX104012]
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Robust electrocatalyst is a prerequisite to realize high-efficiency hydrogen evolution by water splitting. Expensive platinum (Pt) is a preferred electrode catalyst for state-of-the-art hydrogen evolution reaction (HER). We present here a category of alloyed PtNix electrocatalysts by a facile green chemical reduction method, which are used to catalyze HER during seawater splitting. The catalytic performances are optimized by tuning stoichiometric Pt/Ni ratio, yielding a maximized catalytic behavior for PtNi5 electrode. The minimized onset potential is as low as -0.38 V and the corresponding Tafel slope is 119 mV dec(-1). Moreover, the launched alloy electrodes have remarkable stability at -1.2 V over 12 h. The high efficiency as well as good durability demonstrates the PtNix electrocatalysts to be promising in practical applications. (C) 2017 Elsevier B.V. All rights reserved.
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