| Migration roles of different oxygen species over Cu/CeO 2 for propane and soot combustion | |
Zhang ZR(张梓睿); Kang RN(康润宁) ; Yi XK(衣晓坤); Zhang CH(张晨航); Huang JQ(黄俊钦); Wu, Shaohua; Amaratunga, Gehan A J; Wei XL(魏小林); Bin F(宾峰)
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| Corresponding Author | Bin, Feng(binfeng@imech.ac.cn) |
| Source Publication | SEPARATION AND PURIFICATION TECHNOLOGY
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| 2024-12-03 | |
| Volume | 349Pages:10 |
| ISSN | 1383-5866 |
| Abstract | Determining the migration rules of oxygen species in catalytic combustion, especially for catalysts composed of transition metal oxides, is essential yet challenging. This study hydrothermally synthesized nanospherestructured cerium dioxide (CeO 2 ) and its copper -loaded catalysts (Cu/CeO 2 ) to identify the distinct functions of superficial oxygen species (O) and lattice oxygen (O 2- ). The presence of Cu-Ce solid solution at the Cu/CeO 2 interface lowered the apparent activation energy for the catalytic combustion of propane and soot. The catalytic combustion of propane followed the Mars -van Krevelen mechanism, with O 2- serving as the dominant reactive phase while O played a subordinate role. The solid-solid reaction between soot and superficial oxygen of the catalyst was responsible for catalyzed soot combustion. The O species produced by surface defective sites exhibited higher activity than O 2- , which drained easily at the beginning of the reactions. The isotopic oxygen exchange tests revealed the mechanism of metal oxide (CuO/CeO 2 ) interactions for active oxygen species migration, with the results demonstrating the solid solution at the phase interface as portholes for oxygen migration, thus increasing oxygen mobility between the gaseous phase and the surface by lowering the migration activation energy. In situ, infrared results showed that the reaction path of soot catalytic combustion was single, without any intermediate production formation, compared to multiple paths in the propane oxidation process. This study provided an easily implemented and widely applicable method, which deepens our understanding of the characterization of the function and migration of predominant oxygen species in diverse combustion reactions involving oxide -based catalysts. Additionally, this study clarified differences and similarities between the reaction mechanisms of solid-solid and solid-gas catalysis. |
| Keyword | Active oxygen species Propane Soot Oxygen exchange |
| DOI | 10.1016/j.seppur.2024.127820 |
| Indexed By | SCI ; EI |
| Language | 英语 |
| WOS ID | WOS:001240703000001 |
| WOS Keyword | OXIDATION ; CATALYSTS ; CERIA |
| WOS Research Area | Engineering |
| WOS Subject | Engineering, Chemical |
| Funding Project | National Natural Science Foundation Youth Fund[12302330] ; National Natural Science Foundation of China[52176141] |
| Funding Organization | National Natural Science Foundation Youth Fund ; National Natural Science Foundation of China |
| Classification | 一类 |
| Ranking | 1 |
| Contributor | Bin, Feng |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://dspace.imech.ac.cn/handle/311007/95576 |
| Collection | 高温气体动力学国家重点实验室 |
| Recommended Citation GB/T 7714 | Zhang ZR,Kang RN,Yi XK,et al. Migration roles of different oxygen species over Cu/CeO 2 for propane and soot combustion[J]. SEPARATION AND PURIFICATION TECHNOLOGY,2024,349:10. |
| APA | 张梓睿.,康润宁.,衣晓坤.,张晨航.,黄俊钦.,...&宾峰.(2024).Migration roles of different oxygen species over Cu/CeO 2 for propane and soot combustion.SEPARATION AND PURIFICATION TECHNOLOGY,349,10. |
| MLA | 张梓睿,et al."Migration roles of different oxygen species over Cu/CeO 2 for propane and soot combustion".SEPARATION AND PURIFICATION TECHNOLOGY 349(2024):10. |
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