CoMoO4 and Ni1/3Co2/3MoO4 nanosheets with high performance supercapacitor and nonenzymatic glucose detection properties

Abstract

Novel CoMoO₄ and Ni_1/3Co_2/3MoO₄ nanosheets were synthesized by a time-saving solvothermal method with medium conditions, and characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), and high-resolution TEM (HRTEM). Enhanced specific capacitance (1032.39 F g⁻¹ at 4 A g⁻¹) and good cycle stability (remaining 85.18% at after 1000 cycles) are observed in aqueous KOH electrolytes of Ni_1/3Co_2/3MoO₄ nanosheets, which could be ascribed to the high charge accommodation, small ion-transport resistance, and good electrical conductivity of the ultrathin nanosheet structure. In addition, the as-prepared CoMoO₄ nanosheets exhibited good electrocatalytic activity toward the oxidation of glucose.