Exploring Synergistic effect of Ni <sub/>x</sub> Sn <sub/>2x</sub> S <sub/>4x</sub> Thiospinel with MWCNTs with Enhanced Performance in Dye Sensitized Solar cells, Hydrogen Evolution Reaction and as Supercapacitor

摘要： Trifunctional nickel tin sulfide (NixSn2xS4x) thiospinel like structure composited with multiwall carbon nanotubes (MWCNTs) (M–NixSn2xS4x) was synthesized by a facial method. The unit cell arrangement of prepared composite has been studied by Density Functional Theory (DFT) and the theoretical interpretation satisfactorily inferred the presence of synergistic effect between thiospinel and MWCNTs. High metallic conductivity and superior electrocatalytic activities of M–NixSn2xS4x composite plays a prominent diverse roles as counter electrode for dye sensitized solar cells (DSSCs) with 4.67 % efficiency when compared to Pt (5.23 %) at fluorine doped indium tin oxide (FTO), efficient catalyst like Pt for hydrogen evolution reaction (HER) with good cyclic stability and low over potential of ?41 mV at the cathode current density of 10 mA cm2 and Tafel slope of 43 mV/dec at graphite sheet electrode and as impressive capacitance material at graphite sheet electrode alternate to an expensive current collectors like Ni foam with a specific capacitance value of 1,200 Fg?1 at current density of 1 Ag?1 and long life span of 92.6 % retained up to 15,000 cycles.