Note to users. If you're seeing this message, it means that your browser cannot find this page's style/presentation instructions -- or possibly that you are using a browser that does not support current Web standards. Find out more about why this message is appearing, and what you can do to make your experience of our site the best it can be.

Science 6 April 1973:
Vol. 180. no. 4081, pp. 62 - 64
DOI: 10.1126/science.180.4081.62
Prev | Table of Contents | Next

Articles

Rare-Earth Manganites: Catalysts with Low Ammonia Yield in the Reduction of Nitrogen Oxides

R. J. H. Voorhoeve 1, J. P. Remeika 1, and D. W. Johnson Jr. 1

1 Bell Laboratories, Murray Hill, New Jersey 07974

Rare-earth manganites such as La1-x PbxMnO3, with 0.3 lang x lang 0.6, and their perovskite-like homologs are active catalysts for the reduction of nitric oxide to molecular nitrogen. At low temperatures, innocuous nitrous oxide rather than anmmonia is the main side product. The activity of single crystalline catalysts and of ceramic catalysts of this type is substantially improved by etching with dilute acids.


THIS ARTICLE HAS BEEN CITED BY OTHER ARTICLES:
Perovskite Oxides: Materials Science in Catalysis.
R. J. H. Voorhoeve, D. W. Johnson Jr., J. P. Remeika, and P. K. Gallagher (1977)
Science 195, 827-833
   Abstract »    PDF »
Rare-Earth Manganites: Surface-Segregated Platinum Increases Catalytic Activity.
J. J. CROAT, G. G. TIBBETTS, and S. KATZ (1976)
Science 194, 318-320
   Abstract »    PDF »
Nitric Oxide Reduction Coupled with Carbon Monoxide Oxidation in the Presence of Soluble Metal Catalysts.
J. Reed and R. Eisenberg (1974)
Science 184, 568-570
   Abstract »    PDF »


To Advertise     Find Products

Science. ISSN 0036-8075 (print), 1095-9203 (online)