Nanostructured nickel–cobalt alloy/rGO-SWCNT thin film as an efficient electrocatalyst for hydrogen evolution reactions

CoNi alloy on the surface of rGO-SWCNT can regulate the electron structure, promoting HER performance. CoNi21 alloy exhibited the most notable HER efficiency with an overpotential of 83.5 mV and 291.8 mV at 10 mA cm −2 and 100 mA cm −2 , respectively.