Efficient hydrogen and oxygen evolution electrocatalysis by cobalt and phosphorus dual-doped vanadium nitride nanowires. (March 2019)

• Record Type: Journal Article
• Authors: Yang, H.; Hu, Y.; Huang, D.; Xiong, T.; Li, M.; Balogun, M.-S.; Tong, Y.
• Is Part Of: Materials today chemistry. Volume 11(2019)
• Page Start: 1
• Page End: 7
• Publication Date: 2019-03
• Subjects: Vanadium nitride -- Dual doping -- Oxygen evolution reaction -- Hydrogen evolution reaction; Chemistry -- Periodicals; Materials -- Research -- Periodicals; Materials science -- Periodicals; Chemistry; Materials -- Research; Electronic journals; Periodicals; 660.282
• DOI: 10.1016/j.mtchem.2018.10.004
• Languages: English
• ISSNs: 2468-5194

Abstract

Abstract: Herein, we codoped vanadium nitride (VN) nanowires with cobalt (Co) and phosphorus (P) via a simple hydrothermal and postannealing approach and used as hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) electrocatalysts. Benefiting from the synergistic effect from excellent properties of individual Co, P, and VN, the as-prepared VN-Co-P electrocatalyst displays lower onset overpotentials (137 and 335 mV), lower Tafel slopes, and more excellent stability than VN and VN-Co during HER and OER and shows promising electrocatalysts for HER and OER in alkaline solutions. Graphical abstract: Image 1 Highlights: Vanadium nitride (VN) nanowires are prepared by hydrothermal and annealing methods. Cobalt and phosphorus were doped in VN nanowires. Both hydrogen evolution reaction and oxygen evolution reaction catalytic properties of VN were enhanced after doping. Dual doping could tune the electronic state of VN nanowires. An overall water-splitting device was assembled with an onset potential of 1.54 V.