In situ segregation of cobalt nanoparticles on VN nanosheets via nitriding of Co2V2O7 nanosheets as efficient oxygen evolution reaction electrocatalysts

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journal

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Author(s)

  • Lei Wang
  • Liangsheng Hu
  • Yong Li
  • Biao Gao
  • Hao Song
  • Xuming Zhang
  • Jijiang Fu
  • Kaifu Huo

Detail(s)

Original languageEnglish
Pages (from-to)1-7
Journal / PublicationNano Energy
Volume34
Online published12 Feb 2017
Publication statusPublished - Apr 2017

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.

Research Area(s)

  • Cobalt nanoparticles, In situ segregation, Oxygen evolution reaction, VN nanosheets, Water splitting

Citation Format(s)

In situ segregation of cobalt nanoparticles on VN nanosheets via nitriding of Co2V2O7 nanosheets as efficient oxygen evolution reaction electrocatalysts. / Peng, Xiang; Wang, Lei; Hu, Liangsheng; Li, Yong; Gao, Biao; Song, Hao; Huang, Chao; Zhang, Xuming; Fu, Jijiang; Huo, Kaifu; Chu, Paul K.

In: Nano Energy, Vol. 34, 04.2017, p. 1-7.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journal