▎ 摘　　要

NOVELTY - Composite catalyst comprises 30-80 wt.% graphene, 10-35 wt.% titanium dioxide particles and 10-35 wt.% scandium trioxide particles supported on the graphene. USE - The composite catalyst is useful for hydrogen storage materials (claimed). DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for preparing composite catalyst, comprising (i) adding graphene and titanium source into the organic solvent and stirring to obtain solution A, (ii) adding the scandium source into the organic solvent, then adding water, adding acid for adjusting the pH, and stirring to obtain solution B, (iii) stirring solution B while adding the solution A dropwise into the B solution to obtain sol, (iv) drying the gel, and then grinding into powder, and (v) calcining the powder to obtain final product.