Synthesis and characterization of LaCr{sub 1-x}Ni{sub x}O{sub 3} perovskite oxide catalysts

Journal Article · Sat Mar 01 04:00:00 EST 1997 · Journal of Catalysis

DOI:https://doi.org/10.1006/jcat.1997.1509· OSTI ID:478770

Stojanovic, M; Haverkamp, R G; Mims, C A ^[1]

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1. Univ. of Toronto, Ontario (Canada); and others

A series of perovskite oxide catalysts with the composition LaCr{sub 1-x}Ni{sub x}O{sub 3} (0 {le} x {le} 1) has been synthesized by a modification of the Pechini method. The oxides have been characterized by powder X-ray diffraction, elemental analysis and surface area measurements. The LaCr{sub 1-x}Ni{sub x}O{sub 3} phases have the orthorhombic GdFeO{sub 3} (x < {approximately}0.6) and the rhombohedral LaAlO{sub 3} structure (x > 0.6), in agreement with previous results. The surface and bulk compositions were shown to be equivalent by XPS measurements. Systematic changes in the binding energies of the Cr 2p and Ni 3p features are indicative of a progressive evolution of the electronic properties with nickel atom content (x). The LaCr{sub 1-x}Ni{sub x}O{sub 3} oxides with X {le} 0.5 were shown by thermogravimetric analysis to be stable at 900{degrees}C in H{sub 2}/H{sub 2}O with respect to reduction to nickel metal. 51 refs., 8 figs., 3 tabs.

• OSTI ID: 478770
• Journal Information: Journal of Catalysis, Journal Name: Journal of Catalysis Journal Issue: 2 Vol. 166; ISSN 0021-9517; ISSN JCTLA5
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
40 CHEMISTRY
CHEMICAL COMPOSITION
CHEMICAL PREPARATION
CHROMIUM OXIDES
LANTHANUM OXIDES
NICKEL OXIDES
ORTHORHOMBIC LATTICES
PHOTOELECTRON SPECTROSCOPY
REDUCTION
STOICHIOMETRY
STRUCTURAL CHEMICAL ANALYSIS
SURFACE AREA
THERMAL GRAVIMETRIC ANALYSIS
TRIGONAL LATTICES
X-RAY DIFFRACTION