Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/61733
Title: Vanadium carbide nanoparticles encapsulated in graphitic carbon network nanosheets : a high-efficiency electrocatalyst for hydrogen evolution reaction
Authors: Peng, X
Hu, L
Wang, L
Zhang, X
Fu, J
Huo, K
Lee, LYS 
Wong, KY 
Chu, PK
Keywords: Electrocatalysis
Hierarchical nanosheets
Hydrogen evolution reaction
Magnesium thermic reaction
Vanadium carbide
Issue Date: 2016
Publisher: Elsevier
Source: Nano energy, 2016, v. 26, p. 603-609 How to cite?
Journal: Nano energy 
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.
URI: http://hdl.handle.net/10397/61733
ISSN: 2211-2855
EISSN: 2211-3282
DOI: 10.1016/j.nanoen.2016.06.020
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