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Heterogeneous Bimetallic Mo‐NiP x /NiS y as a Highly Efficient Electrocatalyst for Robust Overall Water Splitting
Author(s) -
Wang Jin,
Zhang Mengke,
Yang Guanglong,
Song Wenwu,
Zhong Weiting,
Wang Xunyue,
Wang Minmin,
Sun Tongming,
Tang Yanfeng
Publication year - 2021
Publication title -
advanced functional materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 6.069
H-Index - 322
eISSN - 1616-3028
pISSN - 1616-301X
DOI - 10.1002/adfm.202101532
Subject(s) - electrocatalyst , phosphide , water splitting , nip , materials science , electrolysis , bimetallic strip , oxygen evolution , nickel , alkaline water electrolysis , nickel sulfide , electrolysis of water , catalysis , chemical engineering , inorganic chemistry , electrode , electrochemistry , chemistry , metallurgy , electrolyte , metal , biochemistry , photocatalysis , engineering , composite material
Highly efficient electrocatalysts composed of earth‐abundant elements are desired for water‐splitting to produce clean and renewable chemical fuel. Herein, a heteroatomic‐doped multi‐phase Mo‐doped nickel phosphide/nickel sulfide (Mo‐NiP x /NiS y ) nanowire electrocatalyst is designed by a successive phosphorization and sulfuration method for boosting overall water splitting (both oxygen and hydrogen evolution reactions (HER)) in alkaline solution. As expected, the Mo‐NiP x /NiS y electrode possesses low overpotentials both at low and high current densities in HER, while the Mo‐NiP x /NiS y heterostructure exhibits high active performance with ultra‐low overpotentials of 137, 182, and 250 mV at the current density of 10, 100, and 400 mA cm −2 in 1 m KOH solution, respectively, in oxygen evolution reaction. In particular, the as‐prepared Mo‐NiP x /NiS y electrodes exhibit remarkable full water splitting performance at both low and high current densities of 10, 100, and 400 mA cm −2 with 1.42, 1.70, and 2.36 V, respectively, which is comparable to commercial electrolysis.