Role of oxygen species and active phase of CuCeZrOx prepared with bacterial cellulose for toluene catalytic oxidation
The present study investigates the active phases and the role of oxygen species in the toluene oxidation process over CuCeZrOx catalysts prepared with bacterial cellulose (BC), and compares them with nitric acid pickling CuCeZrOx-BC(H) and CeZrOx-BC catalysts. The investigation is carried out using...
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| Format: | Article |
| Language: | English |
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KeAi Communications Co., Ltd.
2023-12-01
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| Series: | Carbon Resources Conversion |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2588913323000224 |
| _version_ | 1797647911774846976 |
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| author | Chenhang Zhang Chenchen Zhao Running Kang Qinglan Hao Baojuan Dou Feng Bin |
| author_facet | Chenhang Zhang Chenchen Zhao Running Kang Qinglan Hao Baojuan Dou Feng Bin |
| author_sort | Chenhang Zhang |
| collection | DOAJ |
| description | The present study investigates the active phases and the role of oxygen species in the toluene oxidation process over CuCeZrOx catalysts prepared with bacterial cellulose (BC), and compares them with nitric acid pickling CuCeZrOx-BC(H) and CeZrOx-BC catalysts. The investigation is carried out using in-situ DRIFT, O2-TPD, H2-TPR, XRD, and TEM techniques. Our findings suggest that dispersed CuO species on the catalyst surface, Cu-Ce-Zr-O, and Ce-Zr-O solid solutions are active for toluene oxidation over CuCeZrOx-BC, with corresponding activities decreasing successively. The in-situ DRIFT results demonstrate that gaseous oxygen facilitates the chemisorption of toluene on active oxygen species, forming benzoyl oxide species and partially oxidizing the absorbed intermediates to benzyl alcohol at room temperature. Furthermore, lattice oxygen is experimentally found to be involved in the deep oxidation of toluene, and the lattice oxygen present in dispersed CuO species dominates the toluene oxidation process over CuCeZrOx-BC. |
| first_indexed | 2024-03-11T15:23:26Z |
| format | Article |
| id | doaj.art-b0631a79a3da434399984f1dd9c909df |
| institution | Directory Open Access Journal |
| issn | 2588-9133 |
| language | English |
| last_indexed | 2024-03-11T15:23:26Z |
| publishDate | 2023-12-01 |
| publisher | KeAi Communications Co., Ltd. |
| record_format | Article |
| series | Carbon Resources Conversion |
| spelling | doaj.art-b0631a79a3da434399984f1dd9c909df2023-10-28T05:08:03ZengKeAi Communications Co., Ltd.Carbon Resources Conversion2588-91332023-12-0164255261Role of oxygen species and active phase of CuCeZrOx prepared with bacterial cellulose for toluene catalytic oxidationChenhang Zhang0Chenchen Zhao1Running Kang2Qinglan Hao3Baojuan Dou4Feng Bin5State Key Laboratory of High-Temperature Gas Dynamics, Institute of Mechanics, Chinese Academy of Science, Beijing 100190, China; Tianjin University of Science & Technology, Tianjin 300457, ChinaTianjin University of Science & Technology, Tianjin 300457, ChinaState Key Laboratory of High-Temperature Gas Dynamics, Institute of Mechanics, Chinese Academy of Science, Beijing 100190, ChinaTianjin University of Science & Technology, Tianjin 300457, ChinaTianjin University of Science & Technology, Tianjin 300457, China; Corresponding authors.State Key Laboratory of High-Temperature Gas Dynamics, Institute of Mechanics, Chinese Academy of Science, Beijing 100190, China; Corresponding authors.The present study investigates the active phases and the role of oxygen species in the toluene oxidation process over CuCeZrOx catalysts prepared with bacterial cellulose (BC), and compares them with nitric acid pickling CuCeZrOx-BC(H) and CeZrOx-BC catalysts. The investigation is carried out using in-situ DRIFT, O2-TPD, H2-TPR, XRD, and TEM techniques. Our findings suggest that dispersed CuO species on the catalyst surface, Cu-Ce-Zr-O, and Ce-Zr-O solid solutions are active for toluene oxidation over CuCeZrOx-BC, with corresponding activities decreasing successively. The in-situ DRIFT results demonstrate that gaseous oxygen facilitates the chemisorption of toluene on active oxygen species, forming benzoyl oxide species and partially oxidizing the absorbed intermediates to benzyl alcohol at room temperature. Furthermore, lattice oxygen is experimentally found to be involved in the deep oxidation of toluene, and the lattice oxygen present in dispersed CuO species dominates the toluene oxidation process over CuCeZrOx-BC.http://www.sciencedirect.com/science/article/pii/S2588913323000224Cu-Ce-Zr catalystOxygen speciesActive phaseIn-situ DRIFTCatalytic oxidation |
| spellingShingle | Chenhang Zhang Chenchen Zhao Running Kang Qinglan Hao Baojuan Dou Feng Bin Role of oxygen species and active phase of CuCeZrOx prepared with bacterial cellulose for toluene catalytic oxidation Carbon Resources Conversion Cu-Ce-Zr catalyst Oxygen species Active phase In-situ DRIFT Catalytic oxidation |
| title | Role of oxygen species and active phase of CuCeZrOx prepared with bacterial cellulose for toluene catalytic oxidation |
| title_full | Role of oxygen species and active phase of CuCeZrOx prepared with bacterial cellulose for toluene catalytic oxidation |
| title_fullStr | Role of oxygen species and active phase of CuCeZrOx prepared with bacterial cellulose for toluene catalytic oxidation |
| title_full_unstemmed | Role of oxygen species and active phase of CuCeZrOx prepared with bacterial cellulose for toluene catalytic oxidation |
| title_short | Role of oxygen species and active phase of CuCeZrOx prepared with bacterial cellulose for toluene catalytic oxidation |
| title_sort | role of oxygen species and active phase of cucezrox prepared with bacterial cellulose for toluene catalytic oxidation |
| topic | Cu-Ce-Zr catalyst Oxygen species Active phase In-situ DRIFT Catalytic oxidation |
| url | http://www.sciencedirect.com/science/article/pii/S2588913323000224 |
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