| abstract |
A catalyst comprising manganese oxides and lead oxides is effective in oxidizing and purifying the exhaust gases containing carbon monoxide and is possessed of combustion facilitating effect, and further, a catalyst comprising said manganese oxides and lead oxides together with an oxide of alkali earth elements, transition elements, rare earth elements or such substance as silicon dioxide, aluminum oxide, or such metals as aluminum, copper and iron is extremely effective in oxidizing and purifying the exhaust gas containing carbon monoxide. |