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Synthesis of perovsite-type oxide catalysts, Ln(Fe, Co)O3 (Ln = La, Pr, Sm, Gd, Dy, Ho, Er, and Yb), from the thermal decomposition of the corresponding cyano complexes

Paper ID Volume ID Publish Year Pages File Format Full-Text
55529 47056 2012 6 PDF Available
Title
Synthesis of perovsite-type oxide catalysts, Ln(Fe, Co)O3 (Ln = La, Pr, Sm, Gd, Dy, Ho, Er, and Yb), from the thermal decomposition of the corresponding cyano complexes
Abstract

The influence of A-site lanthanoids in the perovskite-type oxide catalysts, LnFexCo1−xO3 (Ln = La, Pr, Sm, Gd, Dy, Ho, Er, and Yb), prepared by the thermal decomposition of cyano complexes, Ln[FexCo1−x(CN)6]·nH2O, on the catalytic activity of CO oxidation was investigated. Using XRD, N2 adsorption, SEM, XPS, and H2-temperature programmed reduction (TPR) techniques, it was found that A-site lanthanoid ions in perovskite-type oxide LnFeO3 affect the formation temperature of single phase, the crystalline structure, and the size of perovskite-type oxide particles. The catalytic activity of LnCoO3 was improved by the replacement of Co ion with Fe ion regardless of the kind of A-site lanthanoid ion. A-site lanthanoids in perovskite-type oxide also affect the reducibility of B-site Co ion in LnFe0.5Co0.5O3, leading to the change in the catalytic property. TPR results of LnFe0.5Co0.5O3 suggest that the reducibility of Co ion is related to the distortion of perovskite structure.

Graphical abstractFigure optionsDownload full-size imageDownload high-quality image (316 K)Download as PowerPoint slideHighlights► A-site lanthanoid ions in perovskite-type oxide affected the formation temperature of single phase, the crystalline structure, and the size of perovskite-type oxide particles. ► The catalytic activity of LnCoO3 was improved by the replacement of Co ion with Fe ion regardless of the kind of A-site lanthanoid ion. ► A-site lanthanoids in perovskite-type oxide affected the reducibility of B-site cobalt ion, leading to the change in the catalytic property.

Keywords
Perovskite-type oxide; Heteronuclear cyano complex; Thermal decomposition; CO oxidation
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Synthesis of perovsite-type oxide catalysts, Ln(Fe, Co)O3 (Ln = La, Pr, Sm, Gd, Dy, Ho, Er, and Yb), from the thermal decomposition of the corresponding cyano complexes
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Publisher
Database: Elsevier - ScienceDirect
Journal: Catalysis Today - Volume 185, Issue 1, 20 May 2012, Pages 230–235
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us