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 Three-dimensional heterostructures of Co@CuxS core–shell nanowire arrays as efficient bifunctional electrocatalysts for overall water splitting
Tác giả hoặc Nhóm tác giả: 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
Nơi đăng: Colloids and Surfaces A: Physicochemical and Engineering Aspects Ngày Đăng: 20.10. 2020; Số: journal homepage: www.elsevier.com/locate/colsurfa;Từ->đến trang: journal homepage: www.elsevier.com/locate/colsurfa;Năm: 2020
Lĩnh vực: Khoa học công nghệ; Loại: Bài báo khoa học; Thể loại: Quốc tế
TÓM TẮT
ABSTRACT Developing low-cost, efficient and stable bifunctional electrocatalysts for overall water splitting is very necessary to meet the demand for green H2 fuel in the near future. In this work, we have developed a novel hierarchical heterostructure of CuxS nanosheets/Co nanowire arrays supported on three-dimensional Ni foam (Co@CuxS 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 CuxS shell layer, the as-synthesized Co@CuxS 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@CuxS NWs/3D-NF-based electrolyzer shows remarkable performance with a low operating voltage of 1.55 V at 10 mA cm− 2 and hig
ABSTRACT
ABSTRACT Developing low-cost, efficient and stable bifunctional electrocatalysts for overall water splitting is very necessary to meet the demand for green H2 fuel in the near future. In this work, we have developed a novel hierarchical heterostructure of CuxS nanosheets/Co nanowire arrays supported on three-dimensional Ni foam (Co@CuxS 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 CuxS shell layer, the as-synthesized Co@CuxS 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@CuxS NWs/3D-NF-based electrolyzer shows remarkable performance with a low operating voltage of 1.55 V at 10 mA cm− 2 and hig
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