▎ 摘　　要

NOVELTY - An electrocatalytic oxygen generating composite catalyst comprises 5-95 wt.% nickel phosphorous trisulfide nanosheet and 5-95 wt.% graphene having loading capacity of 0.1-1 mg/cm2. The conductivity of nickel phosphorous trisulfide/graphene composite catalyst is (1x 10-7)-(1x 105) S/m. The starting potential is 1.46-1.60 V. The overpotentials at current densities of 10 mA/cm2 and 100 mA/cm2 are 294-350 mV and 351-450 mV. The Tafel slope is 42.6-80 mV/dec. USE - Electrocatalytic oxygen generating composite catalyst. ADVANTAGE - The electrocatalytic oxygen generating composite catalyst can achieve lower initial potential of electrocatalytic oxygen production, smaller Tafel slope, lower loading capacity, high operating stability and low overpotential allow for higher current densities for superior electrocatalytic performance. The preparation process is simple, and economical and utilizes the excellent electrocatalytic oxygen production activity of nickel phosphorous trisulfide, the high specific surface area and excellent electrical conductivity of graphene to overcome poor conductivity and uneven dispersion of nickel phosphorous trisulfide. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for preparation of electrocatalytic oxygen generating composite catalyst.