Bi-metallic oxidation catalyst materials and appurtenant devices and systems

A catalytic device, the device comprising:

• a support body;
• one or more metal A bulk deposits disposed on the support body, and
• a plurality of metal B atomic clusters disposed on at least one of the metal A bulk deposits, wherein at least 85% by weight of the metal B atomic clusters comprise up to 10 metal B atoms, and the maximum metal B atomic cluster size is 200 metal B atoms;
• wherein metal A and metal B are different metals each selected from the group consisting of platinum group metals (PGM), Ag, Au, Ni, Co, and Cu.

A bimetallic oxidation catalyst device configured to treat exhaust gas generated by a gasoline internal combustion engine, the device comprising:

• a canister;
• a non-metal support body disposed within the canister;
• a plurality of metal A bulk deposits disposed on the support body;
• and
• a plurality of metal B atomic clusters disposed on at least one of the metal A bulk deposits, wherein at least 85% by weight of the metal B atomic clusters comprise up to 10 metal B atoms, and the maximum metal B atomic cluster size is 200 metal B atoms;
• wherein metal A and metal B are different metals each selected from the group consisting of platinum group metals (PGM), Ag, Au, Ni, Co, and Cu.