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Three-dimensionally ordered macroporous SrFeO3−δ with high surface area: Active catalysts for the complete oxidation of toluene

Paper ID Volume ID Publish Year Pages File Format Full-Text
40937 45871 2012 8 PDF Available
Title
Three-dimensionally ordered macroporous SrFeO3−δ with high surface area: Active catalysts for the complete oxidation of toluene
Abstract

Three-dimensionally ordered macroporous (3DOM) cubic perovskite-type oxides SrFeO3−δ were prepared using the citrate acid-assisted poly(methyl methacrylate)-templating method in the presence of ethylene glycol, sucrose or l-lysine (denoted as SFO-0, SFO-Sucrose, and SFO-Lysine, respectively). It is found that the SrFeO3−δ samples possessed a 3DOM architecture and were high in surface area (34–61 m2/g). The porous SrFeO3−δ catalysts performed well in toluene combustion, with the SFO-0 sample exhibiting the highest catalytic activity (T50% = 292 °C and T90% = 340 °C at 20,000 mL/(g h)). The catalytic activity of the samples showed a good relationship with surface area, oxygen adspecies concentration, and low-temperature reducibility, all decrease in the order of SFO-0 > SFO-Lysine > SFO-Sucrose ≫ SFO-bulk. It is deduced that the good catalytic performance of the porous SrFeO3−δ materials is due to the good low-temperature reducibility, large surface area, and high oxygen adspecies concentration.

Graphical abstractFigure optionsDownload full-size imageDownload high-quality image (125 K)Download as PowerPoint slideHighlights► 3DOM SrFeO3−δ with high surface areas are prepared by the PMMA-templating method. ► Surfactant addition results in increase of 3DOM SrFeO3−δ surface area. ► 3DOM SrFeO3−δ are high in surface area and Oads content and good in reducibility. ► 3DOM SrFeO3−δ catalysts perform well in the combustion of toluene. ► Surface area, Oads content, and reducibility account for the good catalytic activity.

Keywords
Colloidal crystal templating preparation method; Three-dimensional ordered macroporous perovskite-type oxide; Oxygen-deficient strontium ferrite; Low-temperature reducibility; Toluene combustion
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Three-dimensionally ordered macroporous SrFeO3−δ with high surface area: Active catalysts for the complete oxidation of toluene
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis A: General - Volumes 425–426, 28 May 2012, Pages 153–160
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