▎ 摘　　要

NOVELTY - A catalyst is a metal oxide-graphene oxide composite, a metal oxide-porous graphene composite, a porous graphene, a metal oxide-reduced graphene oxide composite, a metal oxide-graphene-supported carbon nanofibers composite, or graphene-supported carbon nanofibers. USE - Catalyst is used for hydrolysis of sodium borohydride during hydrogen production (claimed). ADVANTAGE - The catalyst is prepared by simple process, and has excellent activity and stability. DETAILED DESCRIPTION - A catalyst is a metal oxide-graphene oxide composite of formula: M3O4-GO, a metal oxide-porous graphene composite of formula: MOx-PG, porous graphene (PG), a metal oxide-reduced graphene oxide composite of formula: M3O4-rGO, a metal oxide-graphene-supported carbon nanofibers composite of formula: MOx-GCNFs, or graphene-supported carbon nanofibers (GCNFs), where M is cobalt and manganese. An INDEPENDENT CLAIM is included for preparation of the catalyst, which involves dispersing graphene oxide and metal oxide (M3O4) nanocrystals in an absolute ethanol, stirring, adding the ethanol dispersion of metal oxide nanocrystals and ethanol dispersion of graphene oxide, stirring for 12-16 hours, leaving, discarding the supernatant, and drying at 50-80 degrees C.