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Lookup NU author(s): Professor Paul Christensen,
Mohd Md Ahid,
Professor David Manning,
Dr Michael Carroll
This is the authors' accepted manuscript of an article that has been published in its final definitive form by Royal Society of Chemistry, 2019.
For re-use rights please refer to the publisher's terms and conditions.
© 2018 the Owner Societies. This paper reports on the thermally-driven and non-thermal plasma-driven reaction of IsoPropyl Alcohol (IPA) on ceria (CeO2) with the aim to investigate the differences between plasma catalytic interactions and the analogous thermal reactions. Both were studied by in situ infrared spectroscopy: using diffuse reflectance for the thermal reaction and reflectance infrared for the plasma. For the thermal reaction, the activity towards the formation of acetone and acetaldehyde and, at higher temperatures, CO2 was dependent upon the coverage of surface carbonates and bicarbonates, suggesting at least some of these species blocked the relevant active sites. However, for the first time, methane and cold CO was observed and this was interpreted in terms of a roaming mechanism taking place at the surface via a loose transition state. By contrast, the plasma-driven process was not inhibited by adsorbed carbonaceous species producing acetone followed by isophorone and a polymethylacetylene-like polymer. Comparisons are made between the equivalent thermal and plasma reactions of isopropyl alcohol on Macor and tin oxide surfaces. On Macor the plasma produced similar products whereas on tin oxide there was no reaction. This suggests that the selection of catalysts for plasma processing cannot necessarily be determined from the equivalent thermal process.
Author(s): Christensen PA, Mashhadani ZTAW, Md Ali AHB, Manning DAC, Carroll MA, Martin PA
Publication type: Article
Publication status: Published
Journal: Physical Chemistry Chemical Physics
Online publication date: 19/12/2018
Acceptance date: 19/12/2018
Date deposited: 25/02/2019
ISSN (print): 1463-9076
ISSN (electronic): 1463-9084
Publisher: Royal Society of Chemistry
PubMed id: 30601497
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