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Low temperature catalytic oxidation of nitric oxide over the Mn–CoOx catalyst modified by nonthermal plasma

Paper ID Volume ID Publish Year Pages File Format Full-Text
49869 46770 2015 6 PDF Available
Title
Low temperature catalytic oxidation of nitric oxide over the Mn–CoOx catalyst modified by nonthermal plasma
Abstract

•The activity of NTP-treated catalysts improved significantly for NO oxidation.•Plasma treatment varied the surface area and pore volume of catalyst significantly.•The chemisorbed oxygen and surface specie valence were varied significantly.•Synergetic catalytic effect between Co and Mn with possible mechanism was proposed.

Nonthermal plasma (NTP) treatment was investigated to modify the Mn–CoOx catalyst for the low-temperature oxidation of nitric oxide. The catalysts were characterized by XRD, BET, TGA and XPS techniques. The results showed that the activity of NTP-treated catalysts improved significantly, and that NTP treatment has the advantage of changing the structural and morphological properties (higher surface areas and pore volume) and varying the relative surface concentration and oxidation states of surface species over catalysts. High surface areas and pore volume, high concentration of chemisorbed oxygen, Mn4 + and Co2 +, and the efficient synergetic catalytic effect between Co and Mn ions were thought to be the main reasons for the high activity of NTP-treated catalysts.

Graphical abstractThe activity of catalysts treated by NTP improved significantly due to high surface areas and pore volume, high concentration of chemisorbed oxygen, high Mn4 + and Co2 +, and the efficient synergetic catalytic effect (electron transfer) between Co and Mn.Figure optionsDownload full-size imageDownload as PowerPoint slide

Keywords
Mn–Co catalyst; Nitric oxide; Catalytic oxidation; Nonthermal plasma; Surface modification
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Low temperature catalytic oxidation of nitric oxide over the Mn–CoOx catalyst modified by nonthermal plasma
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Publisher
Database: Elsevier - ScienceDirect
Journal: Catalysis Communications - Volume 64, 5 April 2015, Pages 12–17
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