Insights into the Role of Nanorod-Shaped MnO<sub>2</sub> and CeO<sub>2</sub> in a Plasma Catalysis System for Methanol Oxidation
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-MnO<sub>2</sub> and CeO<sub>2</sub&...
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MDPI AG
2023-03-01
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| Series: | Nanomaterials |
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| Online Access: | https://www.mdpi.com/2079-4991/13/6/1026 |
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| author | Guangyi Zhang Gui Chen Haomin Huang Yexia Qin Mingli Fu Xin Tu Daiqi Ye Junliang Wu |
| author_facet | Guangyi Zhang Gui Chen Haomin Huang Yexia Qin Mingli Fu Xin Tu Daiqi Ye Junliang Wu |
| author_sort | Guangyi Zhang |
| collection | DOAJ |
| description | 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-MnO<sub>2</sub> and CeO<sub>2</sub> 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-MnO<sub>2</sub> and CeO<sub>2</sub> exhibited good performance in methanol conversion (up to 100%), but the CO<sub>2</sub> selectivity of CeO<sub>2</sub> (up to 59.3%) was much higher than that of γ-MnO<sub>2</sub> (up to 28.6%). Catalyst characterization results indicated that CeO<sub>2</sub> contained more surface-active oxygen species, adsorbed more methanol and utilized more plasma-induced active species than γ-MnO<sub>2</sub>. 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 (O<sub>2</sub><sup>2−</sup>, O<sup>2−</sup>) from ozone decomposition were produced on CeO<sub>2</sub> compared with γ-MnO<sub>2</sub>, and less of the intermediate product formate accumulated on the CeO<sub>2</sub>. The combined results showed that CeO<sub>2</sub> was a more effective catalyst than γ-MnO<sub>2</sub> for methanol oxidation in the plasma catalysis system. |
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| language | English |
| last_indexed | 2024-03-11T06:05:35Z |
| publishDate | 2023-03-01 |
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| series | Nanomaterials |
| spelling | doaj.art-dc312de3d5ef44569e34d9dc516a36742023-11-17T13:00:29ZengMDPI AGNanomaterials2079-49912023-03-01136102610.3390/nano13061026Insights into the Role of Nanorod-Shaped MnO<sub>2</sub> and CeO<sub>2</sub> in a Plasma Catalysis System for Methanol OxidationGuangyi Zhang0Gui Chen1Haomin Huang2Yexia Qin3Mingli Fu4Xin Tu5Daiqi Ye6Junliang Wu7College of Environment and Energy, South China University of Technology, Guangzhou 510006, ChinaCollege of Environment and Energy, South China University of Technology, Guangzhou 510006, ChinaCollege of Environment and Energy, South China University of Technology, Guangzhou 510006, ChinaProvincial Key Laboratory of Atmospheric Environment and Pollution Control, National Engineering Laboratory for VOCs Pollution Control Technology and Equipment, Guangzhou 510006, ChinaCollege of Environment and Energy, South China University of Technology, Guangzhou 510006, ChinaDepartment of Electrical Engineering and Electronics, University of Liverpool, Liverpool L69 3GJ, UKCollege of Environment and Energy, South China University of Technology, Guangzhou 510006, ChinaCollege of Environment and Energy, South China University of Technology, Guangzhou 510006, ChinaPublished 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-MnO<sub>2</sub> and CeO<sub>2</sub> 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-MnO<sub>2</sub> and CeO<sub>2</sub> exhibited good performance in methanol conversion (up to 100%), but the CO<sub>2</sub> selectivity of CeO<sub>2</sub> (up to 59.3%) was much higher than that of γ-MnO<sub>2</sub> (up to 28.6%). Catalyst characterization results indicated that CeO<sub>2</sub> contained more surface-active oxygen species, adsorbed more methanol and utilized more plasma-induced active species than γ-MnO<sub>2</sub>. 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 (O<sub>2</sub><sup>2−</sup>, O<sup>2−</sup>) from ozone decomposition were produced on CeO<sub>2</sub> compared with γ-MnO<sub>2</sub>, and less of the intermediate product formate accumulated on the CeO<sub>2</sub>. The combined results showed that CeO<sub>2</sub> was a more effective catalyst than γ-MnO<sub>2</sub> for methanol oxidation in the plasma catalysis system.https://www.mdpi.com/2079-4991/13/6/1026methanol oxidationplasma catalysisCeO<sub>2</sub>MnO<sub>2</sub>in situ ft-IR |
| spellingShingle | Guangyi Zhang Gui Chen Haomin Huang Yexia Qin Mingli Fu Xin Tu Daiqi Ye Junliang Wu Insights into the Role of Nanorod-Shaped MnO<sub>2</sub> and CeO<sub>2</sub> in a Plasma Catalysis System for Methanol Oxidation Nanomaterials methanol oxidation plasma catalysis CeO<sub>2</sub> MnO<sub>2</sub> in situ ft-IR |
| title | Insights into the Role of Nanorod-Shaped MnO<sub>2</sub> and CeO<sub>2</sub> in a Plasma Catalysis System for Methanol Oxidation |
| title_full | Insights into the Role of Nanorod-Shaped MnO<sub>2</sub> and CeO<sub>2</sub> in a Plasma Catalysis System for Methanol Oxidation |
| title_fullStr | Insights into the Role of Nanorod-Shaped MnO<sub>2</sub> and CeO<sub>2</sub> in a Plasma Catalysis System for Methanol Oxidation |
| title_full_unstemmed | Insights into the Role of Nanorod-Shaped MnO<sub>2</sub> and CeO<sub>2</sub> in a Plasma Catalysis System for Methanol Oxidation |
| title_short | Insights into the Role of Nanorod-Shaped MnO<sub>2</sub> and CeO<sub>2</sub> in a Plasma Catalysis System for Methanol Oxidation |
| title_sort | insights into the role of nanorod shaped mno sub 2 sub and ceo sub 2 sub in a plasma catalysis system for methanol oxidation |
| topic | methanol oxidation plasma catalysis CeO<sub>2</sub> MnO<sub>2</sub> in situ ft-IR |
| url | https://www.mdpi.com/2079-4991/13/6/1026 |
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