CoSe2/WSe2/WO3 hybrid nanowires on carbon cloth for efficient hydrogen evolution reaction

Abstract

Hydrogen evolution reaction (HER) plays a very important role in energy conversion process. Thus, it is urgent to find high property and low price electrocatalysts for HER. In this work, CoSe2/WSe2/WO3 hybrid nanowires (NWs) on carbon cloth (CC) as a highly efficient HER catalyst is reported at the first time. It can be found that the obtained CoSe2/WSe2/WO3 NWs/CC catalyst exhibits superior catalytic properties toward HER with small onset potential and Tafel slope. To achieve a current density of 10 mA cm−2, CoSe2/WSe2/WO3 NWs/CC only requires an overpotential of 115 mV, which is more outstanding than the WSe2/WO3 NWs/CC. It also shows superior stability with a slight drop in alkaline condition for a duration of 48 h. Such excellent catalytic activity of HER might attribute to the synergistic effect between cobalt (Co) and tungsten (W) elements. The results of all these Experimental performance tests clearly reveal that CoSe2/WSe2/WO3 NWs/CC intrinsically improves HER electrocatalytic activity and thus has potential electrochemical applications in water splitting.