Three-dimensional heterostructures of Co@CuxS core–shell nanowire arrays as efficient bifunctional electrocatalysts for overall water splitting

[Display omitted] 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...

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Veröffentlicht in:Colloids and surfaces. A, Physicochemical and engineering aspects Physicochemical and engineering aspects, 2021-02, Vol.611, p.125779, Article 125779
Hauptverfasser: Thi, L.D.L., Din, N.V., Dinh, C.N., Nguyen, N.T., Manh, T.D., Nguyen, V.T., Tac, D.V., Hai, L.T.
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Sprache:eng
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Zusammenfassung:[Display omitted] 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 high long-term stability, which offers a favorable evidence for potential of our catalyst in practical application.
ISSN:0927-7757
1873-4359
DOI:10.1016/j.colsurfa.2020.125779