Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/76406
Title: In situ segregation of cobalt nanoparticles on VN nanosheets via nitriding of Co2V2O7 nanosheets as efficient oxygen evolution reaction electrocatalysts
Authors: Peng, X
Wang, L
Hu, LS 
Li, Y 
Gao, B
Song, H
Huang, C
Zhang, XM
Fu, JJ
Huo, KF
Chu, PK
Keywords: Cobalt nanoparticles
VN nanosheets
In situ segregation
Water splitting
Oxygen evolution reaction
Issue Date: 2017
Publisher: Elsevier
Source: Nano energy, 2017, v. 34, p. 1-7 How to cite?
Journal: Nano energy 
Abstract: Metallic Cobalt nanoparticles segregated in situ on conductive vanadium nitride (Co/VN) nanosheets synthesized by ammonia nitridation of hydrothermally prepared Co2V2O7 nanosheets are investigated as high-performance oxygen evolution reaction (OER) electrocatalysts. The metallic Co nanoparticles with a large number of exposed active sites are distributed uniformly and adhere firmly to the VN substrate to enhance the OER efficiency, facilitate fast charge transfer, and improve the stability. As a result, a small overpotential of 320 mV is required to achieve a current density of 10 mA cm(-2) with a small Tafel slope of 55 mV dec(-1). The excellent stability is indicated by an overpotential shift of only 34 mV after 2000 cyclic voltammetry cycles at a large current density of 200 mA cm(-2). The precious-metal-free Co/VN nanosheets deliver outstanding OER performance and are promising as electrocatalysts in water splitting and related applications.
URI: http://hdl.handle.net/10397/76406
ISSN: 2211-2855
EISSN: 2211-3282
DOI: 10.1016/j.nanoen.2017.02.016
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