title: Self-supported nanoporous NiCo2O4 nanowires with cobalt-nickel layered oxide nanosheets for overall water splitting.
abstract: Water splitting via the hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) in producing H2 and O2 is a very important process in the energy field. Developing an efficient catalyst which can be applied to both HER and OER is crucial. Here, a bifunctional catalyst, CFP/NiCo2O4/Co0.57Ni0.43LMOs, has been successfully fabricated. It exhibits remarkable performance for OER in 0.1 M KOH producing a current density of 10 mA cm(-2) at an overpotential of 0.34 V (1.57 V vs. RHE), better than that of the commercial Ir/C (20%) catalyst. Simultaneously, it also exhibits good catalytic performance for HER in 0.5 M H2SO4 producing a current density of 10 mA cm(-2) at an overpotential of 52 mV and a Tafel slope of 34 mV dec(-1), approaching that of the commercial Pt/C (20%) nanocatalyst. Particularly, CFP/NiCo2O4/Co0.57Ni0.43LMOs present better durability under harsh OER and HER cycling conditions than commercial Ir/C and Pt/C. Furthermore, an H-type electrolyzer was fabricated by applying CFP/NiCo2O4/Co0.57Ni0.43LMOs as the cathode and anode electrocatalyst, which can be driven by a single-cell battery. This bifunctional catalyst will be very promising in overall water splitting.
authors.affiliation: Key Laboratory of Nonferrous Metal Chemistry and Resources Utilization of Gansu Province, State Key Laboratory of Applied Organic Chemistry and The Research Center of Biomedical Nanotechnology, Lanzhou University, Lanzhou, 730000, P. R. China. xipx@lzu.edu.cn.
authors.forename: Jie
authors.initials: J
authors.lastname: Yin
authors.affiliation: Key Laboratory of Nonferrous Metal Chemistry and Resources Utilization of Gansu Province, State Key Laboratory of Applied Organic Chemistry and The Research Center of Biomedical Nanotechnology, Lanzhou University, Lanzhou, 730000, P. R. China. xipx@lzu.edu.cn.
authors.forename: Panpan
authors.initials: P
authors.lastname: Zhou
authors.affiliation: Key Laboratory of Nonferrous Metal Chemistry and Resources Utilization of Gansu Province, State Key Laboratory of Applied Organic Chemistry and The Research Center of Biomedical Nanotechnology, Lanzhou University, Lanzhou, 730000, P. R. China. xipx@lzu.edu.cn and Key Laboratory of Advanced Energy Materials Chemistry (Ministry of Education), Nankai University, Tianjin, 300071, P. R. China.
authors.forename: Li
authors.initials: L
authors.lastname: An
authors.affiliation: Key Laboratory of Nonferrous Metal Chemistry and Resources Utilization of Gansu Province, State Key Laboratory of Applied Organic Chemistry and The Research Center of Biomedical Nanotechnology, Lanzhou University, Lanzhou, 730000, P. R. China. xipx@lzu.edu.cn.
authors.forename: Liang
authors.initials: L
authors.lastname: Huang
authors.affiliation: Advanced Ceramic Fibers and Composites laboratory, College of Aerospace Science and Engineering, National University of Defense Technology, Changsha, 410073, P. R. China.
authors.forename: Changwei
authors.initials: C
authors.lastname: Shao
authors.affiliation: Advanced Ceramic Fibers and Composites laboratory, College of Aerospace Science and Engineering, National University of Defense Technology, Changsha, 410073, P. R. China.
authors.forename: Jun
authors.initials: J
authors.lastname: Wang
authors.affiliation: Key Laboratory of Nonferrous Metal Chemistry and Resources Utilization of Gansu Province, State Key Laboratory of Applied Organic Chemistry and The Research Center of Biomedical Nanotechnology, Lanzhou University, Lanzhou, 730000, P. R. China. xipx@lzu.edu.cn.
authors.forename: Hongyan
authors.initials: H
authors.lastname: Liu
authors.affiliation: Key Laboratory of Nonferrous Metal Chemistry and Resources Utilization of Gansu Province, State Key Laboratory of Applied Organic Chemistry and The Research Center of Biomedical Nanotechnology, Lanzhou University, Lanzhou, 730000, P. R. China. xipx@lzu.edu.cn and Key Laboratory of Advanced Energy Materials Chemistry (Ministry of Education), Nankai University, Tianjin, 300071, P. R. China.
authors.forename: Pinxian
authors.initials: P
authors.lastname: Xi