Bimetallic (FexNi1−x)2P nanoarrays as exceptionally efficient electrocatalysts for oxygen evolution in alkaline and neutral media. (August 2017)

• Record Type: Journal Article
• Authors: Zhang, Bowei; Lui, Yu Hui; Ni, Hongwei; Hu, Shan
• Is Part Of: Nano energy. Volume 38(2017:Aug.)
• Page Start: 553
• Page End: 560
• Publication Date: 2017-08
• Subjects: FeNi-P -- Nanoarrays -- Electrocatalysis -- OER -- Alkaline and neutral media; Nanoscience -- Periodicals; Nanotechnology -- Periodicals; Nanostructured materials -- Periodicals; Power resources -- Technological innovations -- Periodicals; Nanoscience; Nanostructured materials; Nanotechnology; Power resources -- Technological innovations; Periodicals; 621.042
• DOI: 10.1016/j.nanoen.2017.06.032
• Languages: English
• ISSNs: 2211-2855

Abstract

Abstract: A specific investigation has been carried out of the electronic structures, Ni oxidation properties, and electrochemical activities of (Fex Ni1−x )2 P for oxygen evolution reaction (OER) in alkaline and neutral media, respectively. The optimized hierarchical Fe-Ni phosphide electrode shows exceptional OER performances under both alkaline and neutral conditions, even much superior to RuO2 catalyst. It only needs extremely low overpotentials of 156 mV and 255 mV to catalyze 10 and 500 mA/cm 2 OER current densities in 1 M KOH. Furthermore, a current density of 10 mA/cm 2 was achieved at a small overpotential of 396 mV in 0.1 M phosphate buffer. Graphical abstract: Highlights: Exceptional OER performances were catalyzed by the novel FeNi-P alloy. Insight into the mechanisms underlying the excellent OER activities. Firstly reported Fe-doped compound as efficient neutral OER catalyst. Novel FeNi-P nanoarrays with tunable ratio were fabricated successfully.