Increasing cerium dispersion favours lattice oxygen activity of cobalt oxides for CO catalytic combustion
文献类型：期刊论文
| 作者 | Qin, Chunlan2; Xu, Kangwei1,3; Shi, Ying2; Ruan, Shanshan2; He, Chenliang2; Zhang, Lidong2,4 |
| 刊名 | COMBUSTION AND FLAME
 |
| 出版日期 | 2024-02-01 |
| 卷号 | 260页码:8 |
| 关键词 | Catalytic combustion of CO Cerium doping MvK mechanism DFT |
| ISSN号 | 0010-2180 |
| DOI | 10.1016/j.combustflame.2023.113219 |
| 通讯作者 | Zhang, Lidong(zld@ustc.edu.cn) |
| 英文摘要 | Removing carbon monoxide with catalytic combustion technology is an effective and economical solution. Highly efficient conversion of CO at low temperatures can be achieved by introducing a catalyst, and its application in automotive exhaust emissions and preferential oxidation of CO in fuel cells is remarkable. In this work, catalysts were prepared by mixing the prepared cerium organic framework with Co3O4, and after calcination at 400 degrees C, the organic framework collapsed, resulting in a uniform dispersion of Ce on the Co3O4 nano surface. Experimental results demonstrated that the required temperature of the catalyst is 101 degrees C when the conversion is 90 %, and it remained stable over the 75 h tested at 100 degrees C. High resolution transmission electron microscopy (HRTEM) revealed that Ce/Co3O4 primarily exposed 311 surface. Combined with DFT calculations, the catalysts may improve the catalytic combustion activity of CO by multiplying the oxygen vacancies and modulating the dispersion of Ce atoms. The reaction occurred on the 311 surface predominantly. Activated CO* preferred to react with the lattice oxygen at the Ce-O-Co linkage compared to the lattice oxygen at Co-O-Co. Energy barrier for the rate dictating step in the complete catalytic cycle is 0.42 eV. This work not only provides experimental support and theoretical basis for the design of low-temperature catalytic combustion CO catalysts, but also provides new ideas for the doping of metal oxides with lanthanide metals. |
| WOS关键词 | OXIDATION ; CO3O4 ; COMPOSITES |
| 资助项目 | National Natural Science Foundation of China[51976207] ; University of Science and Technology of China ; Hefei Advanced Computing Center |
| WOS研究方向 | Thermodynamics ; Energy & Fuels ; Engineering |
| 语种 | 英语 |
| WOS记录号 | WOS:001127180200001 |
| 出版者 | ELSEVIER SCIENCE INC |
| 资助机构 | National Natural Science Foundation of China ; University of Science and Technology of China ; Hefei Advanced Computing Center |
| 源URL | [http://ir.giec.ac.cn/handle/344007/40451]  |
| 专题 | 中国科学院广州能源研究所 |
| 通讯作者 | Zhang, Lidong |
| 作者单位 | 1.Chinese Acad Sci, Guangzhou Inst Energy Convers, Guangzhou 510640, Peoples R China 2.Univ Sci & Technol China, Natl Synchrotron Radiat Lab, Hefei 230029, Anhui, Peoples R China 3.Univ Sci & Technol China, Sch Energy Sci & Engn, Hefei 230029, Peoples R China 4.Univ Sci & Technol China, State Key Lab Fire Sci, Hefei 230026, Anhui, Peoples R China |
| 推荐引用方式 GB/T 7714 | Qin, Chunlan,Xu, Kangwei,Shi, Ying,et al. Increasing cerium dispersion favours lattice oxygen activity of cobalt oxides for CO catalytic combustion[J]. COMBUSTION AND FLAME,2024,260:8. |
| APA | Qin, Chunlan,Xu, Kangwei,Shi, Ying,Ruan, Shanshan,He, Chenliang,&Zhang, Lidong.(2024).Increasing cerium dispersion favours lattice oxygen activity of cobalt oxides for CO catalytic combustion.COMBUSTION AND FLAME,260,8. |
| MLA | Qin, Chunlan,et al."Increasing cerium dispersion favours lattice oxygen activity of cobalt oxides for CO catalytic combustion".COMBUSTION AND FLAME 260(2024):8. |
入库方式： OAI收割
来源：广州能源研究所
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