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Effect of partial substitution of lanthanum by strontium or bismuth on structural features of the lanthanum manganite nanoparticles as a catalyst for carbon monoxide oxidation

Paper ID Volume ID Publish Year Pages File Format Full-Text
51225 46836 2012 6 PDF Available
Title
Effect of partial substitution of lanthanum by strontium or bismuth on structural features of the lanthanum manganite nanoparticles as a catalyst for carbon monoxide oxidation
Abstract

The effect of partial substitution of lanthanum by strontium or bismuth in LaMnO3 nano-perovskites, i.e. La(1 − x)(Sr or Bi)xMnO3 samples, in which x = 0.0, 0.2 or 0.4, is explored for stoichiometric oxidation of carbon monoxide with air. FT-IR and XRD analyses confirmed the perovskite structure for the catalysts. Average crystallite size of the products was calculated by the data of XRD and average particle size was measured from the TEM micrographs. Small effect is observed on perovskite phase formation of LaMnO3 on substitution of lanthanum with strontium or bismuth. Under similar reaction conditions, small substitution of bismuth has a more positive effect than strontium on lowering the CO oxidation temperature.

► Lanthanum manganite is known as an active catalyst for oxidation. ► Lanthanum can be partially substituted with bismuth in LaMnO3. ► A structural change is not observed on this substitution. ► This substitution has positive effect on LaMnO3 as a catalyst for CO oxidation.

Keywords
Carbon monoxide; Nano-perovskite; Lanthanum manganite; Strontium; Bismuth; Oxidation
First Page Preview
Effect of partial substitution of lanthanum by strontium or bismuth on structural features of the lanthanum manganite nanoparticles as a catalyst for carbon monoxide oxidation
Publisher
Database: Elsevier - ScienceDirect
Journal: Catalysis Communications - Volume 28, 5 November 2012, Pages 32–37
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis