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Co<sub>9</sub>S<sub>8</sub> Nanotubes as an Efficient Catalyst for Hydrogen Evolution Reaction in Alkaline Electrolyte
Scientific Research Academy, Jiangsu University, Zhenjiang, China
Scientific Research Academy, Jiangsu University, Zhenjiang, China
Scientific Research Academy, Jiangsu University, Zhenjiang, China
Scientific Research Academy, Jiangsu University, Zhenjiang, China
Scientific Research Academy, Jiangsu University, Zhenjiang, China
Scientific Research Academy, Jiangsu University, Zhenjiang, China
- 1 Scientific Research Academy, Jiangsu University, Zhenjiang, China
- 2 Scientific Research Academy, Jiangsu University, Zhenjiang, China
- 3 Scientific Research Academy, Jiangsu University, Zhenjiang, China
- 4 Scientific Research Academy, Jiangsu University, Zhenjiang, China
- 5 Scientific Research Academy, Jiangsu University, Zhenjiang, China
- 6 Scientific Research Academy, Jiangsu University, Zhenjiang, China
American Journal of Analytical Chemistry·Volume 07 (2016)·Pages 210–218·Published 29 January 2016·DOI10.4236/ajac.2016.72018
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Abstract
Cobalt sulfide (Co 9 S 8 ) nanotubes were found to be an electrocatalyst for the hydrogen evolution reaction under alkaline condition. An electrode comprising of Co 9 S 8 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 Co 9 S 8 /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 Co 9 S 8 nanotubes is nearly 100% during the electrolysis of water.
KeywordsCobalt Sulfide NanotubesElectrocatalystHydrogen Evolution ReactionAlkaline Electrolyte
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