Synthesis of LaMnO{sub 3+{delta}} by firing gels with poly(acrylic acid) in a pure argon stream

Journal Article · Thu Feb 01 04:00:00 EST 1996 · Journal of Solid State Chemistry

DOI:https://doi.org/10.1006/jssc.1996.0069· OSTI ID:223746

Taguchi, Hideki; Sugita, Akio; Nagao, Mahiko ^[1]

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1. Okayama Univ. (Japan)

Perovskite-type LaMnO{sub 3+{delta}} was synthesized by firing the gels with 0.007-0.033 M of poly(acrylic acid) (PAA) in a pure argon stream. The oxygen content, crystallite size (D{sub 024}), specific surface area, and catalytic activity for CO oxidation in LaMnO{sub 3+{delta}} were measured to characterize the LaMnO{sub 3+{delta}} surface. In spite of a small specific surface area, the catalytic activity for CO oxidation on LaMnO{sub 3+{delta}} fired in the pure argon stream is twice that of LaMnO{sub 3+{delta}} fired in air. These results indicate that firing the gels in the pure argon stream improved the crystallinity (regularity of the ions) of the LaMnO{sub 3+{delta}} surface.

• OSTI ID: 223746
• Journal Information: Journal of Solid State Chemistry, Journal Name: Journal of Solid State Chemistry Journal Issue: 2 Vol. 121; ISSN 0022-4596; ISSN JSSCBI
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
40 CHEMISTRY
CARBON MONOXIDE
CATALYTIC EFFECTS
CHEMICAL COMPOSITION
CHEMICAL PREPARATION
GELS
LANTHANUM OXIDES
MANGANESE OXIDES
MICROSTRUCTURE
OXIDATION
SPECIFIC SURFACE AREA
STOICHIOMETRY