过电位
双功能
析氧
分解水
异质结
纳米线
材料科学
纳米技术
介孔材料
催化作用
化学工程
光电子学
化学
电极
电化学
物理化学
光催化
生物化学
工程类
作者
L.D.L. Thi,N.V. Din,C.N. Dinh,N.T. Nguyen,T.D. Manh,V.T. Nguyen,D.V. Tac,L.T. Hai
标识
DOI:10.1016/j.colsurfa.2020.125779
摘要
Developing low-cost, efficient and stable bifunctional electrocatalysts for overall water splitting is very necessary to meet the demand for green H 2 fuel in the near future. In this work, we have developed a novel hierarchical heterostructure of Cu x S nanosheets/Co nanowire arrays supported on three-dimensional Ni foam (Co@Cu x S NWs/3D-NF) as highly active bifunctional electrocatalysts for both the hydrogen (HER) and oxygen (OER) evolution reactions. Inheriting from the advantage of core-shell heterostructure, mesoporous characteristic and chemical coupling effect between Co core and Cu x S shell layer, the as-synthesized Co@Cu x S NWs/3D-NF exhibits high catalytic activity toward HER and OER with requiring small overpotential of 104.6 and 292.2 mV to reach current density of 10 mA cm −2 , respectively. Furthermore, assembled Co@Cu x S NWs/3D-NF-based electrolyzer shows remarkable performance with a low operating voltage of 1.55 V at 10 mA cm −2 and high long-term stability, which offers a favorable evidence for potential of our catalyst in practical application.
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