|Title:||Cobalt molybdenum sulfide decorated with highly conductive sulfur-doped carbon as an electrocatalyst for the enhanced activity of hydrogen evolution reaction||Authors:||Karthik, Raj
Chen, Shen Ming
|Keywords:||Amorphous molybdenum sulfide | Electrocatalytic activity | Long term electrolysis | PEM | Tafel plot | Water splitting||Issue Date:||5-Apr-2019||Journal Volume:||44||Journal Issue:||18||Source:||International Journal of Hydrogen Energy||Abstract:||
© 2019 Hydrogen Energy Publications LLC An advanced hydrogen evolution reaction (HER) catalyst was designed by using Co, Mo and S to prepare a CoMoS 4 /sulfur-doped carbon (SDC) composite. Interestingly, CoMoS 4 /SDC resulted in an improvement in the HER performance with the use of varying amounts of SDC. Therefore, the fundamental structural changes of CoMoS 4 /SDC were scrutinized using various physicochemical techniques, which identified Co 9 S 8 as the dominant active phase. The optimized CoMoS 4 /SDC ratio demonstrated excellent HER activity, with an onset potential of 132 mV and a low Tafel slope of 48 mV/dec. Moreover, the stability of CoMoS 4 /SDC with respect to the HER was demonstrated over a wide range of pH values from 0 to 14. In addition, the developed catalyst was modified in a proton exchange membrane (PEM) water electrolyzer to investigate its sustainability, and it exhibited good stability for 100 h at a current density of 110 mA/cm 2 and an overpotential of 220 mV. There was no deterioration in the catalytic activity over the 100 h of operation.
|Appears in Collections:||政治學系|
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