| abstract |
(57) [Summary] [PROBLEMS] To activate at room temperature of 50 ° C. or less to decompose and remove environmentally harmful substances such as CO, amines and formaldehyde. A noble metal is supported on an oxide into which oxygen deficiency has been introduced, and 90% or more of the noble metal is supported in the form of fine particles having a particle size of 2 nm or less. Active oxygen contained in oxygen deficiency is 50 ° C with environmentally hazardous substances adsorbed on the catalyst surface. Reacts at the following room temperature to oxidatively decompose environmentally hazardous substances. Active oxygen is consumed by the reaction with environmental load substances, Oxygen gas contained in the air is taken into the catalyst to become active oxygen, which further reacts with environmental load substances. By supporting the noble metal as fine particles, the active sites are extremely large and the activity at room temperature of 50 ° C. or lower is extremely high. |