COMPOSITION BASED ON GOLD, CERIUM OXIDE AND ALUMINUM OXIDE, SILICON, TUNGSTEN, VANADIUM, MOLYBDENUM OR NIOBIUM, PROCESS FOR PREPARATION AND USE AS CATALYST.

摘要

The composition of the invention is based on gold on a support and is characterized in that it has a halogen content expressed by the molar ratio halogen / gold is at most 0.04, in that gold is in the form of particles having a size of at most 10 nm and in that the support is based on cerium oxide and at least one oxide of another element M1 chosen from aluminum, silicon, tungsten, vanadium, molybdenum and niobium. This composition may be used as a catalyst in an air purification treatment, this air containing at least one carbon monoxide type compound or the volatile or malodorous organic compounds type.