Djurleite Copper Sulfide-Coupled Cobalt Sulfide Interface for a Stable and Efficient Electrocatalyst

• DOI: 10.1021/acsami.2c06010
• Publication Date: 2022-06-28T12:47:09Z
• Authors: Nandapriya Manivelan; Senthil Karuppanan; Kandasamy Prabakar
• Keywords: Overpotential; Oxygen evolution; Cobalt sulfide; Copper sulfide

Transition metal sulfides (TMS) exhibit proliferated edge sites, facile electrode kinetics, and improved intrinsic electrical conductivity, which demand low potential requirements for total water splitting application. Here, we have propounded copper sulfide-coupled cobalt sulfide nanosheets grown on 3D nickel as an electrocatalyst hydrogen (HER) oxygen evolution (OER) reactions. The formation of djurleite with a Cu vacancy enables faster H+ ion transport shows HER activity remarkably lower overpotential 164 mV at 10 mA/cm2, whereas cobalt-incorporated undergoes cation exchange during synthesis elevated OER 240 mA/cm2 the OER. Moreover, Cu2-xS/Co is said to hybrid CoS-CoS2 interface provide Co2+ active sites surface enable fast adsorption intermediate species (OH*, O*, OOH*), lowers requirement. structure are helpful in supplying more reactive OER, respectively. full-cell electrolyzer requires very 1.58 V attain current density it excellent stability 50 h 100 confirmed by chronopotentiometry test.