TITLE:
Co9S8 Nanotubes as an Efficient Catalyst for Hydrogen Evolution Reaction in Alkaline Electrolyte
AUTHORS:
Lihuang Jin, Cuncai Lv, Jie Wang, Han Xia, Yaoxing Zhao, Zhipeng Huang
KEYWORDS:
Cobalt Sulfide Nanotubes, Electrocatalyst, Hydrogen Evolution Reaction, Alkaline Electrolyte
JOURNAL NAME:
American Journal of Analytical Chemistry,
Vol.7 No.2,
February
25,
2016
ABSTRACT: Cobalt sulfide (Co9S8)
nanotubes were found to be an electrocatalyst for the hydrogen evolution
reaction under alkaline condition. An electrode comprising of Co9S8 nanotubes on a glass carbon electrode (GCE) (mass loading: 0.855 mg·cm-2) produced a cathodic current density of 20 mA·cm-2 at an overpotential of 320 mV. The Co9S8/GCE
electrode was stable over 20,000 s during potentiostatic electrolysis. Minor
degradation of reduction current after 4000 cyclic voltammetric sweeps suggests
the long-term viability under operating conditions. The faradaic efficiency of
Co9S8 nanotubes is nearly 100% during the electrolysis of
water.