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Excellent catalytic performance, thermal stability, and water resistance of 3DOM Mn2O3-supported Au–Pd alloy nanoparticles for the complete oxidation of toluene

Paper ID Volume ID Publish Year Pages File Format Full-Text
39169 45810 2015 9 PDF Available
Title
Excellent catalytic performance, thermal stability, and water resistance of 3DOM Mn2O3-supported Au–Pd alloy nanoparticles for the complete oxidation of toluene
Abstract

•Au–Pd alloy nanoparticles are uniformly dispersed on the 3DOM Mn2O3 surface.•Au–Pd/3DOM Mn2O3 nanocatalysts exhibit high activity for toluene oxidation.•Au–Pd/3DOM Mn2O3 shows high thermal stability during toluene oxidation.•Water vapor introduction induces a positive effect on toluene oxidation.•There is a strong interaction between Au–Pd nanoparticles and 3DOM Mn2O3.

Three-dimensionally ordered macroporous (3DOM) Mn2O3-supported AuPdy alloy (xAuPdy/3DOM Mn2O3; x = 1.0–3.8 wt%; Pd/Au molar ratio : y = 1.85, 1.92) catalysts were prepared using the polymethyl methacrylate-templating and polyvinyl alcohol-protected reduction methods, respectively. Physicochemical properties of the samples were characterized by means of numerous techniques, and their catalytic activities were evaluated for toluene oxidation. It is found that the AuPdy alloy nanoparticles (NPs) with an particle size of 2–4 nm were uniformly dispersed on the surface of 3DOM Mn2O3, and the 3.8AuPd1.92/3DOM Mn2O3 sample performed the best: the temperature at 90% toluene conversion was 162 °C at 40,000 mL/(g h). Furthermore, the 3.8AuPd1.92/3DOM Mn2O3 sample was highly active even after calcination at 700 °C. The introduction of water vapor to the feedstock induced a positive effect on toluene oxidation over 3.8AuPd1.92/3DOM Mn2O3, but a negative effect over 1.9Au/3DOM Mn2O3 or 1.9Pd/3DOM Mn2O3. The excellent catalytic activity, thermal stability, and water resistance of 3.8AuPd1.92/3DOM Mn2O3 were associated with its good activation adsorption of oxygen on AuPd1.92 NPs and strong interaction between noble metal NPs and 3DOM Mn2O3. The 3DOM Mn2O3-supported AuPdy alloy NPs are promising industrial catalysts for efficient removal of volatile organic compounds.

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Keywords
Three-dimensionally ordered macroporous manganese oxide; Au–Pd alloy nanoparticle; Toluene oxidation; Thermal stability; Water resistance
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Excellent catalytic performance, thermal stability, and water resistance of 3DOM Mn2O3-supported Au–Pd alloy nanoparticles for the complete oxidation of toluene
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis A: General - Volume 507, 25 October 2015, Pages 82–90
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