▎ 摘　　要

NOVELTY - Preparing flexible nitrogen-doped graphene-coated cobalt phosphide hollow microspheres, comprises e.g. (i) adding styrene monomer and emulsifier into deionized water, stirring to form emulsion, then adding initiator while stirring and reacting in water bath at 30-100degrees Celsius for 1-36 hours, filtering and washing to obtain polystyrene microspheres, (ii) adding the polystyrene microspheres obtained in step (i) to mixed solution of deionized water and ethanol, and then adding cobalt acetate, stirring, adding ammonia water, reacting in water bath at 30-100degrees Celsius for 1-36 hours under stirring, performing centrifugal washing, calcining the obtained powder in tube furnace under the protection of hydrogen-argon mixture, and cooling to obtain metal cobalt hollow microspheres, and (iii) evenly mixing the cobalt hollow microspheres with nitrogen source and phosphorus source, raising the temperature of conventional furnace, calcining, and natural cooling to obtain final product. USE - The flexible nitrogen-doped graphene-coated cobalt phosphide hollow microspheres is useful in catalysis of ammonia borane to release hydrogen ADVANTAGE - The cobalt phosphide hollow microspheres: has low price, large specific surface area, excellent catalytic performance, and high hydrogen release rate of catalytic borane ammonia; and is non-toxic and harmless. DETAILED DESCRIPTION - Preparing flexible nitrogen-doped graphene-coated cobalt phosphide hollow microspheres, comprises (i) taking styrene monomer, initiator, emulsifier and deionized water, the mass ratio between styrene monomer and initiator is 1:0.0001-1, the mass ratio between styrene monomer and emulsifier is1: 0.0001-1, the mass ratio between styrene monomer and deionized water is 1: 1-1000, adding styrene monomer and emulsifier into deionized water, stirring vigorously to form emulsion, then adding initiator while stirring and reacting in water bath at 30-100degrees Celsius for 1-36 hours, filtering and washing to obtain polystyrene microspheres, (ii) adding the polystyrene beads obtained in step (i) to mixed solution of deionized water and ethanol, and then adding cobalt acetate, the mass ratio between polystyrene microspheres and cobalt acetate is 1: 1-500, stirring, adding, ammonia water, the mass ratio between polystyrene microspheres to ammonia water is 1:0.001-100, reacting in water bath at 30-100degrees Celsius for 1-36 hours under stirring, performing centrifugal washing, calcining the obtained powder at 200-700degrees Celsius for 0.5-12 hours in tube furnace under the protection of hydrogen-argon mixture, and cooling to obtain metal cobalt hollow microspheres, and (iii) evenly mixing the cobalt hollow microspheres with nitrogen source and phosphorus source in mass ratio of 1:30-100:0.1-50, raising the temperature of conventional furnace, calcining at high temperature for 0.5-12 hours, and natural cooling to obtain final product. An INDEPENDENT CLAIM is also included for flexible nitrogen-doped graphene-coated cobalt phosphide hollow microspheres