▎ 摘　　要

NOVELTY - Preparation of dual-functional catalyst, involves (S1) dissolving polyacrylonitrile and cobalt chloride in dimethylformamide, performing electrospinning and carbonization treatment to prepare loaded carbon nanofibers, (S2) keeping loaded nano-carbon fiber and nano-selenium powder with a weight ratio of 1:2.2-2.6 under vacuum airtight conditions at 500-750 degrees C for 1.5-3 hours to prepare modified carbon nano-fibers, (S3) dropping the dispersion of black phosphorus nanoplatelets onto the surface of the modified carbon nanofibers made by (S2), maintaining the weight ratio of the black phosphorus nanosheet dispersion to the modified carbon nanofiber at 0.1-0.5:1 and preparing the finished catalyst after drying. USE - Preparation of highly efficient and stable dual-functional catalyst (claimed). ADVANTAGE - The method enables preparation of bifunctional catalyst with high efficiency and stability by economical method.