Journal
APPLIED SURFACE SCIENCE
Volume 442, Issue -, Pages 352-360Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.apsusc.2018.02.142
Keywords
CoP/WS2; Nanoflakes; Electrocatalyst; Hydrogen evolution reaction
Categories
Funding
- National Natural Science Foundation of China [51772079, 51672073, 21371053, 21376065]
- Natural Science Foundation of Heilongjiang Province of China [B2017009]
- Special Fund of Technological Innovation Talents in Harbin City [2015RAQXJ003]
- University Nursing Program for Young Scholars with Creative Talents in Heilongjiang Province [UNPYSCT-2016076]
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The CoP/WS2 nanoflake composites were synthesized via the sulfuration and subsequent phosphidation using the pre-prepared WO2.72 nanowires as precursors. Originally, WO2.72 nanowires were prepared and followed by sulfuration to obtain WS2 nanoflakes. The as-prepared WS2 nanoflakes were used as substrates, on which the Co3O4 nanoparticles were uniformly anchored to construct the Co3O4/WS2 nanoflakes. Finally, the Co3O4/WS2 composites were subjected to phosphidation and in-situ converted into CoP/WS2 nanoflakes. Because of the dual functionalities of both CoP and WS2, the abundant interfaces as well as their synergy, the CoP/WS2 nanoflakes exhibited much higher electrocatalytic activity, smaller overpotential (-81 mV), lower Tafel slope (62 mV decade(-1)), and higher stability toward hydrogen-evolution reaction than those for the single CoP and WS2. (C) 2018 Elsevier B.V. All rights reserved.
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