Zhang, Guangyi, Chen, Gui, Huang, Haomin, Qin, Yexia, Fu, Mingli, Tu, Xin 
ORCID: 0000-0002-6376-0897, Ye, Daiqi and Wu, Junliang
(2023)
Insights into the Role of Nanorod-Shaped MnO2 and CeO2 in a Plasma Catalysis System for Methanol Oxidation.
Nanomaterials, 13 (6).
p. 1026.
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Abstract
<jats:p>Published papers highlight the roles of the catalysts in plasma catalysis systems, and it is essential to provide deep insight into the mechanism of the reaction. In this work, a coaxial dielectric barrier discharge (DBD) reactor packed with γ-MnO2 and CeO2 with similar nanorod morphologies and particle sizes was used for methanol oxidation at atmospheric pressure and room temperature. The experimental results showed that both γ-MnO2 and CeO2 exhibited good performance in methanol conversion (up to 100%), but the CO2 selectivity of CeO2 (up to 59.3%) was much higher than that of γ-MnO2 (up to 28.6%). Catalyst characterization results indicated that CeO2 contained more surface-active oxygen species, adsorbed more methanol and utilized more plasma-induced active species than γ-MnO2. In addition, in situ Raman spectroscopy and Fourier transform infrared spectroscopy (FT-IR) were applied with a novel in situ cell to reveal the major factors affecting the catalytic performance in methanol oxidation. More reactive oxygen species (O22−, O2−) from ozone decomposition were produced on CeO2 compared with γ-MnO2, and less of the intermediate product formate accumulated on the CeO2. The combined results showed that CeO2 was a more effective catalyst than γ-MnO2 for methanol oxidation in the plasma catalysis system.</jats:p>
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | methanol oxidation, plasma catalysis, CeO2, MnO2, in situ ft-IR |
| Divisions: | Faculty of Science and Engineering > School of Electrical Engineering, Electronics and Computer Science |
| Depositing User: | Symplectic Admin |
| Date Deposited: | 29 Mar 2023 08:57 |
| Last Modified: | 19 Apr 2023 16:59 |
| DOI: | 10.3390/nano13061026 |
| Open Access URL: | https://www.mdpi.com/2079-4991/13/6/1026 |
| Related URLs: | |
| URI: | https://livrepository.liverpool.ac.uk/id/eprint/3169343 |
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