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CO and soot oxidation over macroporous perovskite LaFeO3

Paper ID Volume ID Publish Year Pages File Format Full-Text
53644 46977 2015 8 PDF Available
Title
CO and soot oxidation over macroporous perovskite LaFeO3
Abstract

•Catalytic performances of bulk, supported and porous LaFeO3 for CO and soot oxidation are investigated.•Porous LaFeO3 has enhanced surface area, richer active lattice oxygen and stronger reducibility relative to the other two samples.•Porous LaFeO3 shows the best activity to both CO and soot oxidation.•Porous LaFeO3 shows strong resistance to vapor and its activity can be recovered when vapor is switched off.•Porous LaFeO3 is highly stable and the structure remains unchanged after the reaction.

Bulk, supported and macroporous perovskite LaFeO3 are synthesized and investigated as catalysts for CO and soot oxidation. The structure and physicochemical properties of LaFeO3 are characterized by XRD patterns, N2 physisorption isotherms, TEM, XPS, O2-TPD and H2-TPR measurements. Pure LaFeO3 with desired textural structures are successfully prepared, and the porous sample exhibits the best activity to both reactions, pointing out the importance of fabrication of porous perovskite for the reactions. By correlating with the catalytic activities and the physicochemical properties, it is inferred that the best activity obtained from the porous LaFeO3 is attributed to its large surface area, rich active lattice oxygen and strong surface reducibility. A decrease in the activity of porous LaFeO3 is observed for both reactions when vapor is added, but the activity is sustainable even the vapor percentage increases up to 13.5%, and moreover, the activity can be recovered after vapor is removed.

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Keywords
LaFeO3; Macroporous; Catalytic oxidation; Carbon monoxide; Soot
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CO and soot oxidation over macroporous perovskite LaFeO3
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Publisher
Database: Elsevier - ScienceDirect
Journal: Catalysis Today - Volume 258, Part 2, 1 December 2015, Pages 660–667
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