Cobalt sulfide (Co<sub>9</sub>S<sub>8</sub>) nanotubes were found to be an electrocatalyst for the hydrogen evolution reaction under alkaline condition. An electrode comprising of Co<sub>...Cobalt sulfide (Co<sub>9</sub>S<sub>8</sub>) nanotubes were found to be an electrocatalyst for the hydrogen evolution reaction under alkaline condition. An electrode comprising of Co<sub>9</sub>S<sub>8</sub> nanotubes on a glass carbon electrode (GCE) (mass loading: 0.855 mg·cm<sup>-2</sup>) produced a cathodic current density of 20 mA·cm<sup>-2</sup> at an overpotential of 320 mV. The Co<sub>9</sub>S<sub>8</sub>/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<sub>9</sub>S<sub>8</sub> nanotubes is nearly 100% during the electrolysis of water.展开更多
文摘Cobalt sulfide (Co<sub>9</sub>S<sub>8</sub>) nanotubes were found to be an electrocatalyst for the hydrogen evolution reaction under alkaline condition. An electrode comprising of Co<sub>9</sub>S<sub>8</sub> nanotubes on a glass carbon electrode (GCE) (mass loading: 0.855 mg·cm<sup>-2</sup>) produced a cathodic current density of 20 mA·cm<sup>-2</sup> at an overpotential of 320 mV. The Co<sub>9</sub>S<sub>8</sub>/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<sub>9</sub>S<sub>8</sub> nanotubes is nearly 100% during the electrolysis of water.
