Thermocatalytic Decomposition of Dimethyl Methylphosphonate Based on CeO<sub>2</sub> Catalysts with Different Morphologies
The catalytic performances of the catalysts and decomposition mechanisms of dimethyl methylphosphonate (DMMP), a commonly used nerve agent simulant, are well understood based on previous studies. However, the effects of the morphology of the catalyst on DMMP decomposition performance and mechanisms...
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MDPI AG
2023-02-01
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| author | Weimin Kong Xuwei Wang Kunpeng Wang Qingrong He Shuyuan Zhou Piaoping Yang Yanchun Dong |
| author_facet | Weimin Kong Xuwei Wang Kunpeng Wang Qingrong He Shuyuan Zhou Piaoping Yang Yanchun Dong |
| author_sort | Weimin Kong |
| collection | DOAJ |
| description | The catalytic performances of the catalysts and decomposition mechanisms of dimethyl methylphosphonate (DMMP), a commonly used nerve agent simulant, are well understood based on previous studies. However, the effects of the morphology of the catalyst on DMMP decomposition performance and mechanisms remain unexplored. Thus, in this work, experimental studies were conducted on the thermocatalytic decomposition of DMMP on CeO<sub>2</sub> nanomaterials with different morphologies, e.g., irregular nanoparticles, nanorods, and nanocubes. From the performance evaluation, CeO<sub>2</sub> nanorods exhibited higher DMMP thermocatalytic decomposition performance as compared to irregular nanoparticles and nanocubes. The primary reaction pathways were the same on all three morphologies of materials, according to in situ diffuse reflectance infrared Fourier transform spectroscopy (DRIFTS) study, whereas side reaction paths showed variable behaviors. According to the catalytic reaction mechanism study, the surface lattice oxygen played a vital role in the thermocatalytic decomposition of DMMP and the accumulation of phosphates, carbonates, and formates were the main factors for deactivation of the catalyst. The behavior of CeO<sub>2</sub> catalyst with different morphologies in the thermocatalytic decomposition of DMMP was revealed in this work, and this will be useful for the future design of high-performing catalysts for the efficient degradation of chemical toxicant. |
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| language | English |
| last_indexed | 2024-03-11T07:30:32Z |
| publishDate | 2023-02-01 |
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| spelling | doaj.art-37f229c0bf064627a5a6575c32b21fec2023-11-17T07:19:10ZengMDPI AGApplied Sciences2076-34172023-02-01135309310.3390/app13053093Thermocatalytic Decomposition of Dimethyl Methylphosphonate Based on CeO<sub>2</sub> Catalysts with Different MorphologiesWeimin Kong0Xuwei Wang1Kunpeng Wang2Qingrong He3Shuyuan Zhou4Piaoping Yang5Yanchun Dong6Key Laboratory of Superlight Materials and Surface Technology, Ministry of Education, College of Material Sciences and Chemical Engineering, Harbin Engineering University, Harbin 150001, ChinaKey Laboratory of Superlight Materials and Surface Technology, Ministry of Education, College of Material Sciences and Chemical Engineering, Harbin Engineering University, Harbin 150001, ChinaKey Laboratory of Superlight Materials and Surface Technology, Ministry of Education, College of Material Sciences and Chemical Engineering, Harbin Engineering University, Harbin 150001, ChinaState Key Laboratory of NBC Protection for Civilian, Beijing 102205, ChinaState Key Laboratory of NBC Protection for Civilian, Beijing 102205, ChinaKey Laboratory of Superlight Materials and Surface Technology, Ministry of Education, College of Material Sciences and Chemical Engineering, Harbin Engineering University, Harbin 150001, ChinaState Key Laboratory of NBC Protection for Civilian, Beijing 102205, ChinaThe catalytic performances of the catalysts and decomposition mechanisms of dimethyl methylphosphonate (DMMP), a commonly used nerve agent simulant, are well understood based on previous studies. However, the effects of the morphology of the catalyst on DMMP decomposition performance and mechanisms remain unexplored. Thus, in this work, experimental studies were conducted on the thermocatalytic decomposition of DMMP on CeO<sub>2</sub> nanomaterials with different morphologies, e.g., irregular nanoparticles, nanorods, and nanocubes. From the performance evaluation, CeO<sub>2</sub> nanorods exhibited higher DMMP thermocatalytic decomposition performance as compared to irregular nanoparticles and nanocubes. The primary reaction pathways were the same on all three morphologies of materials, according to in situ diffuse reflectance infrared Fourier transform spectroscopy (DRIFTS) study, whereas side reaction paths showed variable behaviors. According to the catalytic reaction mechanism study, the surface lattice oxygen played a vital role in the thermocatalytic decomposition of DMMP and the accumulation of phosphates, carbonates, and formates were the main factors for deactivation of the catalyst. The behavior of CeO<sub>2</sub> catalyst with different morphologies in the thermocatalytic decomposition of DMMP was revealed in this work, and this will be useful for the future design of high-performing catalysts for the efficient degradation of chemical toxicant.https://www.mdpi.com/2076-3417/13/5/3093nerve agentdimethyl methylphosphonatethermocatalyticCeO<sub>2</sub> |
| spellingShingle | Weimin Kong Xuwei Wang Kunpeng Wang Qingrong He Shuyuan Zhou Piaoping Yang Yanchun Dong Thermocatalytic Decomposition of Dimethyl Methylphosphonate Based on CeO<sub>2</sub> Catalysts with Different Morphologies Applied Sciences nerve agent dimethyl methylphosphonate thermocatalytic CeO<sub>2</sub> |
| title | Thermocatalytic Decomposition of Dimethyl Methylphosphonate Based on CeO<sub>2</sub> Catalysts with Different Morphologies |
| title_full | Thermocatalytic Decomposition of Dimethyl Methylphosphonate Based on CeO<sub>2</sub> Catalysts with Different Morphologies |
| title_fullStr | Thermocatalytic Decomposition of Dimethyl Methylphosphonate Based on CeO<sub>2</sub> Catalysts with Different Morphologies |
| title_full_unstemmed | Thermocatalytic Decomposition of Dimethyl Methylphosphonate Based on CeO<sub>2</sub> Catalysts with Different Morphologies |
| title_short | Thermocatalytic Decomposition of Dimethyl Methylphosphonate Based on CeO<sub>2</sub> Catalysts with Different Morphologies |
| title_sort | thermocatalytic decomposition of dimethyl methylphosphonate based on ceo sub 2 sub catalysts with different morphologies |
| topic | nerve agent dimethyl methylphosphonate thermocatalytic CeO<sub>2</sub> |
| url | https://www.mdpi.com/2076-3417/13/5/3093 |
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