The Catalytic Oxidation of Formaldehyde by FeO<i><sub>x</sub></i>-MnO<sub>2</sub>-CeO<sub>2</sub> Catalyst: Effect of Iron Modification
A series of FeO<i><sub>x</sub></i>-MnO<sub>2</sub>-CeO<sub>2</sub> catalysts were synthesized by the surfactant-templated coprecipitation method and applied for HCHO removal. The influence of Fe/Mn/Ce molar ratio on the catalytic performance was invest...
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MDPI AG
2021-04-01
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| author | Yaxin Dong Chenguang Su Kai Liu Haomeng Wang Zheng Zheng Wei Zhao Suhong Lu |
| author_facet | Yaxin Dong Chenguang Su Kai Liu Haomeng Wang Zheng Zheng Wei Zhao Suhong Lu |
| author_sort | Yaxin Dong |
| collection | DOAJ |
| description | A series of FeO<i><sub>x</sub></i>-MnO<sub>2</sub>-CeO<sub>2</sub> catalysts were synthesized by the surfactant-templated coprecipitation method and applied for HCHO removal. The influence of Fe/Mn/Ce molar ratio on the catalytic performance was investigated, and the FeO<i><sub>x</sub></i>-MnO<sub>2</sub>-CeO<sub>2</sub> catalyst exhibited excellent catalytic activity, with complete HCHO conversion at low temperatures (40 °C) when the molar ratio of Fe/Mn/Ce was 2/5/5. The catalysts were characterized by N<sub>2</sub> adsorption and desorption, XRD, H<sub>2</sub>-TPR, O<sub>2</sub>-TPD and XPS techniques to illustrate their structure–activity relationships. The result revealed that the introduction of FeO<i><sub>x</sub></i> into MnO<sub>2</sub>-CeO<sub>2</sub> formed a strong interaction between FeO<i><sub>x</sub></i>-MnO<sub>2</sub>-CeO<sub>2</sub>, which facilitated the improved dispersion of MnO<sub>2</sub>-CeO<sub>2</sub>, subsequently increasing the surface area and aiding pore development. This promotion effect of Fe enhanced the reducibility and produced abundant surface-active oxygen. In addition, a great number of O<sub>α</sub> is beneficial to the intermediate decomposition, whereas the existence of Ce<sup>3+</sup> favors the formation of oxygen vacancies on the surface of the catalyst, all of which contributed to HCHO oxidation at low temperatures. |
| first_indexed | 2024-03-10T11:53:43Z |
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| language | English |
| last_indexed | 2024-03-10T11:53:43Z |
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| series | Catalysts |
| spelling | doaj.art-0c9fcdcd3c6447e59928bfdd6e77a5b32023-11-21T17:25:44ZengMDPI AGCatalysts2073-43442021-04-0111555510.3390/catal11050555The Catalytic Oxidation of Formaldehyde by FeO<i><sub>x</sub></i>-MnO<sub>2</sub>-CeO<sub>2</sub> Catalyst: Effect of Iron ModificationYaxin Dong0Chenguang Su1Kai Liu2Haomeng Wang3Zheng Zheng4Wei Zhao5Suhong Lu6College of Chemistry and Chemical Engineering, Xi’an Shiyou University, Xi’an 710065, ChinaCollege of Chemistry and Chemical Engineering, Xi’an Shiyou University, Xi’an 710065, ChinaCollege of Chemistry and Chemical Engineering, Xi’an Shiyou University, Xi’an 710065, ChinaCollege of Chemistry and Chemical Engineering, Xi’an Shiyou University, Xi’an 710065, ChinaCollege of Chemistry and Chemical Engineering, Xi’an Shiyou University, Xi’an 710065, ChinaCollege of Chemistry and Chemical Engineering, Xi’an Shiyou University, Xi’an 710065, ChinaCollege of Chemistry and Chemical Engineering, Xi’an Shiyou University, Xi’an 710065, ChinaA series of FeO<i><sub>x</sub></i>-MnO<sub>2</sub>-CeO<sub>2</sub> catalysts were synthesized by the surfactant-templated coprecipitation method and applied for HCHO removal. The influence of Fe/Mn/Ce molar ratio on the catalytic performance was investigated, and the FeO<i><sub>x</sub></i>-MnO<sub>2</sub>-CeO<sub>2</sub> catalyst exhibited excellent catalytic activity, with complete HCHO conversion at low temperatures (40 °C) when the molar ratio of Fe/Mn/Ce was 2/5/5. The catalysts were characterized by N<sub>2</sub> adsorption and desorption, XRD, H<sub>2</sub>-TPR, O<sub>2</sub>-TPD and XPS techniques to illustrate their structure–activity relationships. The result revealed that the introduction of FeO<i><sub>x</sub></i> into MnO<sub>2</sub>-CeO<sub>2</sub> formed a strong interaction between FeO<i><sub>x</sub></i>-MnO<sub>2</sub>-CeO<sub>2</sub>, which facilitated the improved dispersion of MnO<sub>2</sub>-CeO<sub>2</sub>, subsequently increasing the surface area and aiding pore development. This promotion effect of Fe enhanced the reducibility and produced abundant surface-active oxygen. In addition, a great number of O<sub>α</sub> is beneficial to the intermediate decomposition, whereas the existence of Ce<sup>3+</sup> favors the formation of oxygen vacancies on the surface of the catalyst, all of which contributed to HCHO oxidation at low temperatures.https://www.mdpi.com/2073-4344/11/5/555formaldehydeFeO<i><sub>x</sub></i>-MnO<sub>2</sub>-CeO<sub>2</sub>catalytic oxidationcatalytic activity |
| spellingShingle | Yaxin Dong Chenguang Su Kai Liu Haomeng Wang Zheng Zheng Wei Zhao Suhong Lu The Catalytic Oxidation of Formaldehyde by FeO<i><sub>x</sub></i>-MnO<sub>2</sub>-CeO<sub>2</sub> Catalyst: Effect of Iron Modification Catalysts formaldehyde FeO<i><sub>x</sub></i>-MnO<sub>2</sub>-CeO<sub>2</sub> catalytic oxidation catalytic activity |
| title | The Catalytic Oxidation of Formaldehyde by FeO<i><sub>x</sub></i>-MnO<sub>2</sub>-CeO<sub>2</sub> Catalyst: Effect of Iron Modification |
| title_full | The Catalytic Oxidation of Formaldehyde by FeO<i><sub>x</sub></i>-MnO<sub>2</sub>-CeO<sub>2</sub> Catalyst: Effect of Iron Modification |
| title_fullStr | The Catalytic Oxidation of Formaldehyde by FeO<i><sub>x</sub></i>-MnO<sub>2</sub>-CeO<sub>2</sub> Catalyst: Effect of Iron Modification |
| title_full_unstemmed | The Catalytic Oxidation of Formaldehyde by FeO<i><sub>x</sub></i>-MnO<sub>2</sub>-CeO<sub>2</sub> Catalyst: Effect of Iron Modification |
| title_short | The Catalytic Oxidation of Formaldehyde by FeO<i><sub>x</sub></i>-MnO<sub>2</sub>-CeO<sub>2</sub> Catalyst: Effect of Iron Modification |
| title_sort | catalytic oxidation of formaldehyde by feo i sub x sub i mno sub 2 sub ceo sub 2 sub catalyst effect of iron modification |
| topic | formaldehyde FeO<i><sub>x</sub></i>-MnO<sub>2</sub>-CeO<sub>2</sub> catalytic oxidation catalytic activity |
| url | https://www.mdpi.com/2073-4344/11/5/555 |
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