Rare-Earth Manganites: Surface-Segregated Platinum Increases Catalytic Activity
- 15 October 1976
- journal article
- other
- Published by American Association for the Advancement of Science (AAAS) in Science
- Vol. 194 (4262) , 318-320
- https://doi.org/10.1126/science.194.4262.318
Abstract
Crushed and etched lanthanum lead manganite (La 0.7 Pb 0.3 MnO 3 ) crystals containing as little as 0.005 atomic percent platinum have significantly higher catalytic activity than free platinum crystals. This higher activity is due to an almost 100-fold segregation of platinum on the surface. The surface platinum concentration found, 0.5 atomic percent, is sufficient to account for the enhanced activity provided that the platinum has the same activity as platinum supported on alumina.Keywords
This publication has 5 references indexed in Scilit:
- Effects of the Pt content of La0.7Pb0.3MnO3 on its catalytic activity for the oxidation of CO in the presence of SO2Materials Research Bulletin, 1975
- Elucidation of surface structure and bonding by photoelectron spectroscopy?Surface Science, 1975
- The oxidation of hydrocarbons and CO over metal oxides IV. Perovskite-type oxidesJournal of Catalysis, 1975
- Rare-Earth Manganites: Catalysts with Low Ammonia Yield in the Reduction of Nitrogen OxidesScience, 1973
- Rare-Earth Oxides of Manganese and Cobalt Rival Platinum for the Treatment of Carbon Monoxide in Auto ExhaustScience, 1972