| abstract |
Cobalt, manganese and manganese, which are catalysts for removing nitrogen superoxide from a gas mixture containing nitrogen superoxide, having the following composition when expressed as the weight percent of CoO, MnO and transition metal oxides in the lowest valence state: Catalysts comprising mixed oxides of rare earth metals: 38-56% MnO, 22-30% CoO, and 22-32% rare earth metal oxides. |