The invention belongs to the technical field of
hybrid material preparation and relates to a preparation method of a
zinc-based bimetallic-
nitrogen-
doped carbon material. The method comprises the steps of dissolving a
metal chloride,
zinc chloride and a
carbon source molecule in water to form a
mixed solution according to a
mass ratio of 5-15: 5-15: 1; by taking
melamine foam as a framework and anitrogen source, performing fully soaking, taking-out and
drying to obtain a precursor; heating the precursor to 800-1000 DEG C in an
inert gas
atmosphere at a heating rate of 5-10 DEG C / min, annealing for 1-2 hours, and cooling to
room temperature to obtain a carbonized product; and crushing, washing with acid, water and
alcohol, and
drying to obtain the material. According to the preparation method, the
melamine foam is used as the framework and the
nitrogen source, so that the uniform
doping of heteroatoms and the increase of the specific surface area are facilitated,
zinc chloride assistedannealing can be used for pore forming and zinc
doping of the carbon-based material, and the synergistic improvement of the specific surface area of the carbon-based material and the density of zinc-
nitrogen active sites is facilitated. Compared with commercial Pt / C, the
prepared material has higher ORR electrocatalytic activity and stability.