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Title: Preparation of high surface area substituted LaMnO/sub 3/ catalysts

Abstract

Perovskite catalysts in the LaMnO/sub 3/ family have been produced with A site substitutions of Sr, Pb, K and Ce, and with B site substitutions of Ni, Co, Li and Mg from nitrate solutions by freeze drying, spray drying and precipitation. Freeze drying in some cases gave a single phase perovskite at a lower temperature than the other techniques. Substitution of the cations Sr or K for La in LaMnO/sub 3/ produced catalysts with the highest conversion rates. Freeze dried La/sub 0.5/ Sr/sub 0.5/MnO/sub 3/ had the highest surface area (due, in part, to lower temperature heat treatments) and the highest device activity of the group. B site modifiers (Li and Mg) produced active catalysts but also diluted available active sites. Substitution of Ni for Mn gives highly active catalysts while similar substitutions of Co for Mn show less activity.

Authors:
; ; ;
Publication Date:
Research Org.:
Bell Labs., Murray Hill, NJ
OSTI Identifier:
7361649
Resource Type:
Conference
Journal Name:
Am. Ceram. Soc. Bull.; (United States)
Additional Journal Information:
Journal Volume: 55:5; Conference: 77. annual meeting of the American Ceramic Society, Washington, DC, USA, 6 May 1975
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; LANTHANUM COMPOUNDS; CHEMICAL PREPARATION; MANGANATES; CERIUM ADDITIONS; COBALT ADDITIONS; LEAD ADDITIONS; LITHIUM ADDITIONS; MAGNESIUM ADDITIONS; NICKEL ADDITIONS; POTASSIUM ADDITIONS; STRONTIUM ADDITIONS; SURFACE PROPERTIES; ALLOYS; CERIUM ALLOYS; COBALT ALLOYS; LEAD ALLOYS; LITHIUM ALLOYS; MAGNESIUM ALLOYS; MANGANESE COMPOUNDS; NICKEL ALLOYS; OXYGEN COMPOUNDS; POTASSIUM ALLOYS; RARE EARTH ADDITIONS; RARE EARTH ALLOYS; RARE EARTH COMPOUNDS; STRONTIUM ALLOYS; SYNTHESIS; TRANSITION ELEMENT COMPOUNDS; 360201* - Ceramics, Cermets, & Refractories- Preparation & Fabrication

Citation Formats

Johnson, D.W. Jr., Gallagher, P.K., Schrey, F., and Rhodes, W.W. Preparation of high surface area substituted LaMnO/sub 3/ catalysts. United States: N. p., 1976. Web.
Johnson, D.W. Jr., Gallagher, P.K., Schrey, F., & Rhodes, W.W. Preparation of high surface area substituted LaMnO/sub 3/ catalysts. United States.
Johnson, D.W. Jr., Gallagher, P.K., Schrey, F., and Rhodes, W.W. Sat . "Preparation of high surface area substituted LaMnO/sub 3/ catalysts". United States.
@article{osti_7361649,
title = {Preparation of high surface area substituted LaMnO/sub 3/ catalysts},
author = {Johnson, D.W. Jr. and Gallagher, P.K. and Schrey, F. and Rhodes, W.W.},
abstractNote = {Perovskite catalysts in the LaMnO/sub 3/ family have been produced with A site substitutions of Sr, Pb, K and Ce, and with B site substitutions of Ni, Co, Li and Mg from nitrate solutions by freeze drying, spray drying and precipitation. Freeze drying in some cases gave a single phase perovskite at a lower temperature than the other techniques. Substitution of the cations Sr or K for La in LaMnO/sub 3/ produced catalysts with the highest conversion rates. Freeze dried La/sub 0.5/ Sr/sub 0.5/MnO/sub 3/ had the highest surface area (due, in part, to lower temperature heat treatments) and the highest device activity of the group. B site modifiers (Li and Mg) produced active catalysts but also diluted available active sites. Substitution of Ni for Mn gives highly active catalysts while similar substitutions of Co for Mn show less activity.},
doi = {},
journal = {Am. Ceram. Soc. Bull.; (United States)},
number = ,
volume = 55:5,
place = {United States},
year = {1976},
month = {5}
}

Conference:
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