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Author Taguchi, H. ♦ Sugita, A. ♦ Nagao, M.
Source United States Department of Energy Office of Scientific and Technical Information
Content type Text
Language English
Subject Keyword MATERIALS SCIENCE ♦ CHEMISTRY ♦ COAL, LIGNITE, AND PEAT ♦ LANTHANUM OXIDES ♦ CATALYTIC EFFECTS ♦ SURFACE PROPERTIES ♦ MANGANESE OXIDES ♦ CARBON MONOXIDE ♦ OXIDATION ♦ PHOTOELECTRON SPECTROSCOPY ♦ ANNEALING ♦ SPECIFIC SURFACE AREA ♦ MICROSTRUCTURE ♦ X-RAY SPECTROSCOPY
Abstract Perovskite-type LaMnO{sub 3+{delta}}, synthesized using poly(acrylic acid) (PAA), was annealed at 400 and 700{degrees}C in air for 6-54 hr. The crystallite size, the specific surface area, the La/Mn ratio, and the catalytic activity of LaMnO{sub 3+{delta}} were measured to characterize the surface. The specific surface area decreased slightly with increasing annealing time, while the La/Mn ratio of the surface, calculated from the XPS measurements, was independent of annealing time. The catalytic activity for the oxidation of CO increased with annealing. These results suggest that annealing improved the crystallinity (regularity of the ions) of the LaMnO{sub 3+{delta}} surface.
ISSN 00224596
Educational Use Research
Learning Resource Type Article
Publisher Date 1995-10-01
Publisher Place United States
Journal Journal of Solid State Chemistry
Volume Number 119
Issue Number 1


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