Preparation and Electrocatalytic Properties of CuS/NCNT Composites

Copper sulfide was prepared successfully by reflux method in the research. To improve the dispersion and conductivity of copper sulfide, CuS/NCNTs composites were prepared by one-step hydrothermal method using nitrogen doped carbon nanotubes (NCNTs) and copper sulfide. The conductivity and dispersion of the composites were improved, and the catalytic effect of oxygen reduction was significantly increased. The precursor of CuS/NCNTs oxygen reduction catalyst was calcined to obtain CuS/NCNTs oxygen reduction catalyst with good stability and methanol resistance. The onset potential, current density and half-wave potential were significantly improved. In the process of composite materials calcination, the oxygen reduction catalyst with high catalytic rate was obtained by adjusting the proportion of CuS, CNTs and nitrogen sources, which provided a practical experimental method for sulfide oxidant catalysis. This cheap catalytic material was expected to replace noble metal catalyst like Pt/C, and be widely used in the field of oxygen reduction catalyst.