▎ 摘　　要

NOVELTY - Preparing phosphorus-doped graphene nanobelt -supported cobalt single-atom catalyst comprises (i) adding multi-walled carbon nanotubes into a strong oxidizer, oxidizing under certain temperature conditions and multiple centrifugal cleanings to obtain graphene nanobelt, (ii) ultrasonic treating graphene nanobelt, adding phosphor precursor under continuous stirring conditions, performing phosphorus doping in a hydrothermal kettle at high temperature to obtain phosphorus-doped graphene nanobelt, (iii) dissolving the phosphorus-doped graphene nanobelt, stabilizer in deionized water, adding cobalt precursor under continuous stirring conditions, and quickly freeze-drying in liquid nitrogen to react at low temperature, heating at certain temperature under the protection of the atmosphere to react, and annealing at gas protection temperature, naturally cooling the reaction system to room temperature, washing with absolute ethanol for many times, and vacuum-drying to obtain final product. USE - The single-atom catalyst is useful for hydrogen production. ADVANTAGE - The single-atom catalyst: has simple preparation process; and is uniform and regular, and suitable for industrial production.