Iron‐Doped Nickel Phosphide Nanosheets In Situ Grown on Nickel Submicrowires as Efficient Electrocatalysts for Oxygen Evolution Reaction. Issue 10 (13th March 2018)

• Record Type: Journal Article
• Authors: Chen, Jiahui; Li, Yunming; Sheng, Guoqing; Xu, Lu; Ye, Huangqing; Fu, Xian‐Zhu; Sun, Rong; Wong, Ching‐Ping
• Is Part Of: ChemCatChem. Volume 10:Issue 10(2018)
• Page Start: 2248
• Page End: 2253
• Publication Date: 2018-03-13
• Subjects: doping -- iron -- nanostructures -- nickel -- water splitting; Catalysis -- Periodicals; 541.39505
• DOI: 10.1002/cctc.201800036
• Languages: English
• ISSNs: 1867-3880

Abstract

Abstract: Tens of micrometers long metallic Ni submicrowires with a diameter of approximately 200 nm are prepared by a chemical reduction method under a magnetic field. Fe‐doped Ni2 P nanosheets are then in situ grown on Ni submicrowires by a simple wet‐chemical reaction followed by a low‐temperature phosphorization process. The (Ni0.87 Fe0.13 )2 P–Ni composite exhibits the highest catalytic activity toward oxygen evolution reaction in alkaline solution among all the as‐prepared (Ni1− x Fe x )2 P–Ni catalysts, delivering a current density of 10 mA cm −2 at an overpotential of only 257 mV and keeping high stability over 10 h electrolysis. These exceptional activities are attributed to the unique structure combining metallic Ni submicrowires as good electronically conductive substrate and the in situ grown Fe‐doped Ni2 P nanosheets. Specifically, Fe incorporation leads to strong electron interactions between Ni, Fe, and P, fast reaction kinetics, small charge‐transfer resistance, and a large electrochemical surface area, which are responsible for the excellent catalytic performance. Abstract : Non‐noble‐metal‐based electrocatalyst : Fe‐doped Ni2 P nanosheets in situ grown on Ni submicrowires show superior electrocatalytic performance toward oxygen evolution reaction to some state‐of‐the‐art catalysts in alkaline solution.