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Multi‐Interface‐Modulated CoS 2 @MoS 2 Nanoarrays Derived by Predesigned Germanomolybdate Polymer Showing Ultrahighly Electrocatalytic Activity for Hydrogen Evolution Reaction in Wide pH Range
Author(s) -
Hou Yan,
Pang Haijun,
Xin Jianjiao,
Ma Huiyuan,
Li Bonan,
Wang Xinming,
Tan Lichao
Publication year - 2020
Publication title -
advanced materials interfaces
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.671
H-Index - 65
ISSN - 2196-7350
DOI - 10.1002/admi.202000780
Subject(s) - materials science , polyoxometalate , thiourea , bimetallic strip , overpotential , electrocatalyst , polymer , molybdenum , metal , chemical engineering , inorganic chemistry , nanotechnology , electrode , catalysis , electrochemistry , chemistry , organic chemistry , composite material , metallurgy , engineering
The development of non‐noble metal materials for efficient hydrogen evolution reaction (HER) in wide pH range is still a challenge at present. Herein, a predesigned polyoxometalate (POM)‐based metal–organic polymer {L 3 Co 2 · 6H 2 O}[H 3 GeMo 12 O 40 ] · 9H 2 O (L = 1,2,4‐triazole) is employed as bimetallic source together with thiourea converting to CoS 2 @MoS 2 on carbon cloth (CC) (abbreviated to CoS 2 @MoS 2 @CC) for the first time. Impressively, the CoS 2 @MoS 2 in the form of vertically interconnected nanoarrays with multiple interfaces are grown in situ on CC and act as electrodes directly for HER. The CoS 2 @MoS 2 @CC‐30h composite exhibits superb activity and long‐durability in both acidic and alkaline media. Low overpotential is achieved in 0.5 m H 2 SO 4 (65 mV) and 1.0 m KOH (87 mV) for 10 mA cm −2 versus RHE, which overmatch major MoS 2 ‐/POM‐based electrocatalysts. This work therefore may shed substantial lights on designing active and durable molybdenum‐based bi‐/polymetallic sulfide from variable POM‐based metal–organic polymers for electrocatalytic hydrogen evolution reaction in wide pH range.