Tailored Synthesis of Catalytically Active Cerium Oxide for N, N-Dimethylformamide Oxidation
Cerium oxide nanopowder (CeO<sub>x</sub>) was prepared using the sol–gel method for the catalytic oxidation of N, N-dimethylformamide (DMF). The phase, specific surface area, morphology, ionic states, and redox properties of the obtained nanocatalyst were systematically characterized usi...
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2023-01-01
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| author | Cedric Karel Fonzeu Monguen En-Jie Ding Samuel Daniel Jing-Yang Jia Xiao-Hong Gui Zhen-Yu Tian |
| author_facet | Cedric Karel Fonzeu Monguen En-Jie Ding Samuel Daniel Jing-Yang Jia Xiao-Hong Gui Zhen-Yu Tian |
| author_sort | Cedric Karel Fonzeu Monguen |
| collection | DOAJ |
| description | Cerium oxide nanopowder (CeO<sub>x</sub>) was prepared using the sol–gel method for the catalytic oxidation of N, N-dimethylformamide (DMF). The phase, specific surface area, morphology, ionic states, and redox properties of the obtained nanocatalyst were systematically characterized using XRD, BET, TEM, EDS, XPS, H<sub>2</sub>-TPR, and O<sub>2</sub>-TPO techniques. The results showed that the catalyst had a good crystal structure and spherelike morphology with the aggregation of uniform small grain size. The catalyst showed the presence of more adsorbed oxygen on the catalyst surface. XPS and H<sub>2</sub>-TPR have confirmed the reduction of Ce<sup>4+</sup> species to Ce<sup>3+</sup> species. O<sub>2</sub>-TPR proved the reoxidability of CeO<sub>x</sub>, playing a key role during DMF oxidation. The catalyst had a reaction rate of 1.44 mol g<sup>−1</sup><sub>cat</sub> s<sup>−1</sup> and apparent activation energy of 33.30 ± 3 kJ mol<sup>−1</sup>. The catalytic performance showed ~82 ± 2% DMF oxidation at 400 °C. This work’s overall results demonstrated that reducing Ce<sup>4+</sup> to Ce<sup>3+</sup> and increasing the amount of adsorbed oxygen provided more suitable active sites for DMF oxidation. Additionally, the catalyst was thermally stable (~86%) after 100 h time-on-stream DMF conversion, which could be a potential catalyst for industrial applications. |
| first_indexed | 2024-03-09T11:47:34Z |
| format | Article |
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| institution | Directory Open Access Journal |
| issn | 1996-1944 |
| language | English |
| last_indexed | 2024-03-09T11:47:34Z |
| publishDate | 2023-01-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Materials |
| spelling | doaj.art-74813cc1f8d84874a5527adef20293ff2023-11-30T23:19:19ZengMDPI AGMaterials1996-19442023-01-0116286510.3390/ma16020865Tailored Synthesis of Catalytically Active Cerium Oxide for N, N-Dimethylformamide OxidationCedric Karel Fonzeu Monguen0En-Jie Ding1Samuel Daniel2Jing-Yang Jia3Xiao-Hong Gui4Zhen-Yu Tian5Institute of Engineering Thermophysics, Chinese Academy of Sciences, Beijing 100190, ChinaInstitute of Engineering Thermophysics, Chinese Academy of Sciences, Beijing 100190, ChinaInstitute of Engineering Thermophysics, Chinese Academy of Sciences, Beijing 100190, ChinaInstitute of Engineering Thermophysics, Chinese Academy of Sciences, Beijing 100190, ChinaSchool of Emergency Management and Safety Engineering, China University of Mining and Technology, Beijing 100083, ChinaInstitute of Engineering Thermophysics, Chinese Academy of Sciences, Beijing 100190, ChinaCerium oxide nanopowder (CeO<sub>x</sub>) was prepared using the sol–gel method for the catalytic oxidation of N, N-dimethylformamide (DMF). The phase, specific surface area, morphology, ionic states, and redox properties of the obtained nanocatalyst were systematically characterized using XRD, BET, TEM, EDS, XPS, H<sub>2</sub>-TPR, and O<sub>2</sub>-TPO techniques. The results showed that the catalyst had a good crystal structure and spherelike morphology with the aggregation of uniform small grain size. The catalyst showed the presence of more adsorbed oxygen on the catalyst surface. XPS and H<sub>2</sub>-TPR have confirmed the reduction of Ce<sup>4+</sup> species to Ce<sup>3+</sup> species. O<sub>2</sub>-TPR proved the reoxidability of CeO<sub>x</sub>, playing a key role during DMF oxidation. The catalyst had a reaction rate of 1.44 mol g<sup>−1</sup><sub>cat</sub> s<sup>−1</sup> and apparent activation energy of 33.30 ± 3 kJ mol<sup>−1</sup>. The catalytic performance showed ~82 ± 2% DMF oxidation at 400 °C. This work’s overall results demonstrated that reducing Ce<sup>4+</sup> to Ce<sup>3+</sup> and increasing the amount of adsorbed oxygen provided more suitable active sites for DMF oxidation. Additionally, the catalyst was thermally stable (~86%) after 100 h time-on-stream DMF conversion, which could be a potential catalyst for industrial applications.https://www.mdpi.com/1996-1944/16/2/865sol–gel methodcerium oxideactivation energyDMF oxidation |
| spellingShingle | Cedric Karel Fonzeu Monguen En-Jie Ding Samuel Daniel Jing-Yang Jia Xiao-Hong Gui Zhen-Yu Tian Tailored Synthesis of Catalytically Active Cerium Oxide for N, N-Dimethylformamide Oxidation Materials sol–gel method cerium oxide activation energy DMF oxidation |
| title | Tailored Synthesis of Catalytically Active Cerium Oxide for N, N-Dimethylformamide Oxidation |
| title_full | Tailored Synthesis of Catalytically Active Cerium Oxide for N, N-Dimethylformamide Oxidation |
| title_fullStr | Tailored Synthesis of Catalytically Active Cerium Oxide for N, N-Dimethylformamide Oxidation |
| title_full_unstemmed | Tailored Synthesis of Catalytically Active Cerium Oxide for N, N-Dimethylformamide Oxidation |
| title_short | Tailored Synthesis of Catalytically Active Cerium Oxide for N, N-Dimethylformamide Oxidation |
| title_sort | tailored synthesis of catalytically active cerium oxide for n n dimethylformamide oxidation |
| topic | sol–gel method cerium oxide activation energy DMF oxidation |
| url | https://www.mdpi.com/1996-1944/16/2/865 |
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