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Fabrication of MoS 2 ‐Decorated Nickel‐Cobalt Bimetal Phosphide Nanocubes as Efficient Electrocatalysts for Hydrogen Evolution
Author(s) -
Feng Jianhui,
Zhou Hu,
Chen Danyang,
Shao Jinxiao,
Diao Guowang,
Yuan Aihua
Publication year - 2019
Publication title -
chemistryselect
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.437
H-Index - 34
ISSN - 2365-6549
DOI - 10.1002/slct.201903503
Subject(s) - bimetal , phosphide , tafel equation , prussian blue , overpotential , cobalt , materials science , nickel , catalysis , chemical engineering , inorganic chemistry , nanotechnology , chemistry , metallurgy , electrochemistry , electrode , organic chemistry , engineering
Abstract Nickel‐cobalt bimetal phosphides were prepared via the phosphidation treatment of NiCo‐based Prussian blue analogue (PBA). Subsequently, the core‐shell structures of NiCoP@MoS 2 were successfully assembled through a solvothermal reaction, where the NiCoP substrates were uniformly and randomly covered by MoS 2 nanosheets. The resulting hybrids exhibited significantly superior catalytic activities towards hydrogen evolution reaction (HER) in 0.5 M H 2 SO 4 to bare MoS 2 . The optimal catalyst afforded the best HER performance with a low overpotential of 138 mV at 10 mA cm −2 and Tafel slope of 78.1 mV dec −1 , together with high stability and durability. The excellent HER properties of hybrids mainly originated from the unique core‐shell architecture and the intrinsic natures of MoS 2 and PBA‐derived bimetal phosphides.