The invention discloses a
bimetal nanometer catalyst used for preparing
dimethyl oxalate through CO gas-phase oxidative
coupling as well as preparation and an application method of the
bimetal nanometer catalyst, and belongs to the technical field of preparation of the
dimethyl oxalate. The
bimetal nanometer catalyst is characterized in that a catalyst carrier is Alpha-
aluminium oxide, an
active component is Pd-Cu nanometer grains, the
average size of the grain is 2-3nm, the Pd content of the
active component is 0.01-2% and Cu content is 0.01-0.04% according to the
mass of the catalyst carrier. The catalyst is prepared through a
room temperature normal position load method, the preparation method is simple, the energy dissipation is low, the catalyst is suitable for industrial production, the
active component Pd-Cu nanometer grains in the catalyst has high
dispersity, large specific surface area, small size and uniformity in distribution; the catalyst provided by the invention adopts the Pd-Cu bimetal nanometer grains as the active component, and a bimetal component synergistic effect and a nanometer effect are utilized to reduce the content of the
noble metal PD to 0.1% under the premise of keeping the
high activity and stability of the catalyst, therefore and the cost of the catalyst is greatly reduced, and the
partial substitution of the
noble metal is realized.