Vanadium Carbide Nanoparticles Encapsulated in Graphitic Carbon Network Nanosheet : A High-Efficiency Electrocatalyst for Hydrogen Evolution Reaction

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

80 Scopus Citations
View graph of relations

Author(s)

  • Liangsheng Hu
  • Lei Wang
  • Xuming Zhang
  • Jijiang Fu
  • Kaifu Huo
  • Lawrence Yoon Suk Lee
  • Kwok-Yin Wong

Detail(s)

Original languageEnglish
Pages (from-to)603-609
Journal / PublicationNano Energy
Volume26
Online published14 Jun 2016
Publication statusPublished - Aug 2016

Abstract

A hierarchical nanosheet structure comprising isolated vanadium carbide nanoparticles encapsulated in a highly conductive mesoporous graphitic carbon network (VC-NS) is synthesized by a hydrothermal reaction and subsequent low-temperature magnesium thermic reaction. It has a large specific surface area and boasts highly efficient HER (hydrogen evolution reaction) activity such as very small overpotential, fast proton discharge kinetics, and excellent durability. The small Tafel slope of 56 mV dec−1 with a low overpotential of only 98 mV at 10 mA cm−2 is quite close to that of the commercial 20% Pt/C catalyst. The excellent durability is indicated by the overpotential shift of only 10 mV after 10000 cyclic voltammetric cycles at a current density of 80 mA cm−2. The high-performance precious-metal-free electrocatalyst is promising in HER and related energy generation applications.

Research Area(s)

  • Vanadium carbide, Hydrogenevolutionreaction, Electrocatalysis, Hierarchicalnanosheets, Magnesium thermicreaction

Citation Format(s)

Vanadium Carbide Nanoparticles Encapsulated in Graphitic Carbon Network Nanosheet : A High-Efficiency Electrocatalyst for Hydrogen Evolution Reaction. / Peng, Xiang; Hu, Liangsheng; Wang, Lei; Zhang, Xuming; Fu, Jijiang; Huo, Kaifu; Lee, Lawrence Yoon Suk; Wong, Kwok-Yin; Chu, Paul K.

In: Nano Energy, Vol. 26, 08.2016, p. 603-609.

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