▎ 摘　　要

NOVELTY - Preparation of ruthenium-nickel/graphene-composite metal oxide aerogel catalyst comprises adding graphene oxide solution to stripping nickel aluminum hydrotalcite colloidal solution, ultrasonically dispersing, forming hydrogel through layer-by-layer self-assembly, freeze-drying, and calcining under inert atmosphere to obtain reduced graphene oxide-mixed metal oxide (rGO-MMO) aerogel, adding to ruthenium chloride solution, soaking, drying under air atmosphere, and subjecting to reduction under hydrogen-containing atmosphere. USE - The method is for preparation of ruthenium-nickel/graphene-composite metal oxide aerogel catalyst used for purification reaction of carbon monoxide selective methanation in hydrogen-rich gas (claimed). ADVANTAGE - The catalyst does not easily agglomerates, and has large specific surface area, high active metal dispersion, high activity and selectivity, and wide window of suitable operating temperature. The purified hydrogen-rich feed gas can meet the requirements of proton exchange membrane fuel cells for high-quality hydrogen sources. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for a ruthenium-nickel/graphene-composite metal oxide aerogel catalyst.