▎ 摘　　要

NOVELTY - Preparation method of the X element-doped graphene hydrogen storage material modified by Pd-X alloy, involves (1) dispersing a metal source, a nonmetal source and graphene in a solvent to obtain a mixed dispersion liquid, (2)freeze-drying the mixed dispersion to obtain a powder; in a reducing atmosphere, carrying out heat treatment on the powder, and then carrying out heat preservation treatment to obtain a hydrogen storage material before impurity removal treatment; the hydrogen storage material comprises X element doped graphene, and Pd-X alloy is modified on the graphene; x includes at least one of P, N and B. USE - Preparation method of Pd-X alloy modified X element graphene hydrogen storage material used in hydrogen storage technologies such as high pressure gaseous hydrogen storage, organic liquid hydrogen storage and solid hydrogen storage. ADVANTAGE - The Pd-X alloy has excellent promoting effect for enhancing the hydrogen storage material of chemical adsorption hydrogen compared with pure graphene and hydrogen storage materials doped with alkaline earth element, and has excellent hydrogen overflow effect of the transition metal to realize fast H diffusion, and by doping non-metal to change the carbon material internal structure, reducing the interaction between ions, further increasing hydrogen storage amount, and the stable structure is kept in the process of absorbing and desorbing hydrogen. The solution solves the technical problem that transition metal doped carbon-based hydrogen storage is not capable of satisfying the application requirement in the aspects of hydrogen storage and has wide application prospect. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for Pd-X X element doped with the graphene hydrogen storage material, has graphene comprises X element doped graphene, wherein Pd-X alloy is modified on the graphene; x comprises at least one of P, N and B, and the mass concentration of X element doping is 1-7%; the Pd-X alloy comprises PdaPb,PdaBb and PdaNbA ranges from 0.4-16, b ranges from 1- 3. DESCRIPTION OF DRAWING(S) - The drawing shows the experiment example 1 of nano-palladium modified modified reduction oxidation graphite the shape map.