Rare-Earth Oxides of Manganese and Cobalt Rival Platinum for the Treatment of Carbon Monoxide in Auto Exhaust

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Science  28 Jul 1972:
Vol. 177, Issue 4046, pp. 353-354
DOI: 10.1126/science.177.4046.353


The perovskite-like compounds RE1-XPb5MnO3 and RECoO3, where RE (rare earth) is lanthanum, praseodymium, or neodymium, are active catalysts for the oxidation of carbon monoxide. Crushed single crystals of these compounds compare favorably with commercial platinum catalysts in initial activity and lifetime. Therefore, these compounds are promising substitutes for platinum in devices for the catalytic treatment of auto exhaust.

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