title: From Water Oxidation to Reduction: Transformation from Ni(x)Co(3-x)O4 Nanowires to NiCo/NiCoO(x) Heterostructures.
abstract: A homologous Ni-Co based nanowire catalyst pair, composed of Ni(x)Co(3-x)O4 nanowires and NiCo/NiCoO(x) nanohybrid, is developed for efficient overall water splitting. Ni(x)Co(3-x)O4 nanowires are found as a highly active oxygen evolution reaction (OER) catalyst, and they are converted into a highly active hydrogen evolution reaction (HER) catalyst through hydrogenation treatment as NiCo/NiCoO(x) heteronanostructures. An OER current density of 10 mA cm(-2) is obtained with the Ni(x)Co(3-x)O4 nanowires under an overpotential of 337 mV in 1.0 M KOH, and an HER current density of 10 mA cm(-2) is obtained with the NiCo/NiCoO(x) heteronanostructures at an overpotential of 155 mV. When integrated in an electrolyzer, these catalysts demonstrate a stable performance in water splitting.
authors.affiliation: Department of Chemistry, University of Missouri-Kansas City , Kansas City 64110, Missouri United States.
authors.forename: Xiaodong
authors.initials: X
authors.lastname: Yan
authors.affiliation: State Key Laboratory of Luminescence and Applications, Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences , Changchun, 130033, China.
authors.forename: KeXue
authors.initials: K
authors.lastname: Li
authors.affiliation: School of Physics and Electronics, Hunan Key Laboratory for Super-microstructure and Ultrafast Process, Central South University , 932 South Lushan Road, Changsha, Hunan 410083, China.
authors.forename: Lu
authors.initials: L
authors.lastname: Lyu
authors.affiliation: Ecole Polytechnique Fédérale de Lausanne (EPFL) , Institute of Chemical Sciences and Engineering, EPFL-SB-ISIC-LSCI, bch 3350, Lausanne CH 1015, Switzerland.
authors.forename: Fang
authors.initials: F
authors.lastname: Song
authors.affiliation: School of Physics and Electronics, Hunan Key Laboratory for Super-microstructure and Ultrafast Process, Central South University , 932 South Lushan Road, Changsha, Hunan 410083, China.
authors.forename: Jun
authors.initials: J
authors.lastname: He
authors.affiliation: School of Physics and Electronics, Hunan Key Laboratory for Super-microstructure and Ultrafast Process, Central South University , 932 South Lushan Road, Changsha, Hunan 410083, China.
authors.forename: Dongmei
authors.initials: D
authors.lastname: Niu
authors.affiliation: State Key Laboratory of Luminescence and Applications, Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences , Changchun, 130033, China.
authors.forename: Lei
authors.initials: L
authors.lastname: Liu
authors.affiliation: Ecole Polytechnique Fédérale de Lausanne (EPFL) , Institute of Chemical Sciences and Engineering, EPFL-SB-ISIC-LSCI, bch 3350, Lausanne CH 1015, Switzerland.
authors.forename: Xile
authors.initials: X
authors.lastname: Hu
authors.affiliation: Department of Chemistry, University of Missouri-Kansas City , Kansas City 64110, Missouri United States.
authors.forename: Xiaobo
authors.initials: X
authors.lastname: Chen
keywords: hydrogen evolution reaction; metal/metal oxide heterostructures; nanowires; nickel cobalt oxide; oxygen evolution reaction