title: Nickel sulfide microsphere film on Ni foam as an efficient bifunctional electrocatalyst for overall water splitting.
abstract: Developing low-cost, efficient, and bifunctional electrocatalysts for both the hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) is an appealing yet challenging task. Herein, for the first time, a NiS microsphere film was grown in situ on Ni foam (NiS/Ni foam) via a sulfurization reaction as an efficient bifunctional electrocatalyst for overall water splitting with superior activity and good durability. This NiS/Ni foam electrode delivers 20 mA cm(-2) at an overpotential of 158 mV for the HER and 50 mA cm(-2) at an overpotential of 335 mV for the OER in 1.0 M KOH. This bifunctional electrode also enables a high-efficiency alkaline water electrolyzer with 10 mA cm(-2) at a cell voltage of only 1.64 V, which could be promising in water splitting devices for large-scale hydrogen production.
authors.affiliation: College of Food Science and Engineering, Northwest A&F University, Yangling 712100, Shaanxi, China. wanglong79@nwsuaf.edu.cn.
authors.forename: Wenxin
authors.initials: W
authors.lastname: Zhu
authors.forename: Xiaoyue
authors.initials: X
authors.lastname: Yue
authors.forename: Wentao
authors.initials: W
authors.lastname: Zhang
authors.forename: Shaoxuan
authors.initials: S
authors.lastname: Yu
authors.forename: Yuhuan
authors.initials: Y
authors.lastname: Zhang
authors.forename: Jing
authors.initials: J
authors.lastname: Wang
authors.forename: Jianlong
authors.initials: J
authors.lastname: Wang
mesh_terms: D002384:Catalysis; D055664:Electrochemical Techniques / Q000379:methods*; D006859:Hydrogen / Q000737:chemistry; D008855:Microscopy, Electron, Scanning; D046529:Microscopy, Electron, Transmission; D008863:Microspheres; D009532:Nickel / Q000737:chemistry*; D014867:Water / Q000737:chemistry; D014961:X-Ray Diffraction
chemical_list: D014867:Water; D009532:Nickel; D006859:Hydrogen; C017558:nickel sulfide