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Highly Robust Non‐Noble Alkaline Hydrogen‐Evolving Electrocatalyst from Se‐Doped Molybdenum Disulfide Particles on Interwoven CoSe 2 Nanowire Arrays
Author(s) -
Liao Liling,
Sun Jingying,
Li Dongyang,
Yu Fang,
Zhu Yijun,
Yang Yi,
Wang Jinjian,
Zhou Weichang,
Tang Dongsheng,
Chen Shuo,
Zhou Haiqing
Publication year - 2020
Publication title -
small
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 3.785
H-Index - 236
eISSN - 1613-6829
pISSN - 1613-6810
DOI - 10.1002/smll.201906629
Subject(s) - catalysis , molybdenum disulfide , electrocatalyst , materials science , nanowire , molybdenum , water splitting , noble metal , chemical engineering , electrolyte , inorganic chemistry , nanotechnology , electrochemistry , chemistry , electrode , biochemistry , photocatalysis , engineering , metallurgy
Developing efficient non‐noble and earth‐abundant hydrogen‐evolving electrocatalysts is highly desirable for improving the energy efficiency of water splitting in base. Molybdenum disulfide (MoS 2 ) is a promising candidate, but its catalytic activity is kinetically retarded in alkaline media due to the unfavorable water adsorption and dissociation feature. A heterogeneous electrocatalyst is reported that is constructed by selenium‐doped MoS 2 (Se‐MoS 2 ) particles on 3D interwoven cobalt diselenide (CoSe 2 ) nanowire arrays that drives the hydrogen evolution reaction (HER) with fast reaction kinetics in base. The resultant Se‐MoS 2 /CoSe 2 hybrid exhibits an outstanding catalytic HER performance with extremely low overpotentials of 30 and 93 mV at 10 and 100 mA cm –2 in base, respectively, which outperforms most of the inexpensive alkaline HER catalysts, and is among the best alkaline catalytic activity reported so far. Moreover, this hybrid catalyst shows exceptional catalytic performance with very low overpotentials of 84 and 95 mV at 10 mA cm –2 in acidic and neutral electrolytes, respectively, implying robust pH universality of this hybrid catalyst. This work may provide new inspirations for the development of high‐performance MoS 2 ‐based HER electrocatalysts in unfavorable basic media for promising catalytic applications.