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Limited nanospace for growth of Ni–Mn composite oxide nanocrystals with enhanced catalytic activity for deep oxidation of benzene

Paper ID Volume ID Publish Year Pages File Format Full-Text
53897 46988 2015 8 PDF Available
Title
Limited nanospace for growth of Ni–Mn composite oxide nanocrystals with enhanced catalytic activity for deep oxidation of benzene
Abstract

•Growth of Ni–Mn mixed oxide nanocrystal took place in a limited nanospaces by nanocasting method.•The 90% conversion of 1000 ppm benzene at a space velocity of 120,000 mL g−1 h−1 can be low to 249 °C.•The porous Ni–Mn mixed oxide exhibits higher activity than the pure oxides clearly.•The strong synergistic effect leads to more adsorbed oxygen species and better reducibility.

A nanocasting method was applied to synthesize porous manganese oxide, nickel oxide and manganese nickel mixed oxide successfully. The growth of oxide nanocrystals took place in the limited nanospace provided by SBA-15 template and the resulted materials showed a porous structure with high specific surface area. All catalysts were characterized by XRD, SEM, TEM, BET, XPS, H2-TPR techniques and further tested for total oxidation of benzene. The mixed oxide with a higher surface area (162.6 m2 g−1) exhibited the best activity (T90% = 249 °C at a high space velocity of 120,000 mL g−1 h−1), which is much higher than that of the pure oxide. The formation of Mn–Ni solid solution oxide prevented the growth of nanocrystals and the strong synergistic effect gave rise to more adsorbed oxygen species and better low temperature reducibility, which make a great contribution to its superior activity.

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Keywords
Limited nanospace; Synergistic effect; Mn–Ni oxide; Catalytic oxidation; Benzene
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Limited nanospace for growth of Ni–Mn composite oxide nanocrystals with enhanced catalytic activity for deep oxidation of benzene
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Publisher
Database: Elsevier - ScienceDirect
Journal: Catalysis Today - Volume 258, Part 1, 1 December 2015, Pages 148–155
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