| Mesoporous LaCoO3 perovskite oxide with high catalytic performance for NOx storage and reduction | |
Xie, Wen; Xu, Guangyan; Zhang, Yan ; Yu, Yunbo; He, Hong
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| 2022-06-05 | |
| Source Publication | JOURNAL OF HAZARDOUS MATERIALS
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| ISSN | 0304-3894 |
| Volume | 431Issue:0Pages:128528 |
| Abstract | A mesoporous LaCoO3 perovskite oxide (LaCoO3-Meso) with three-dimensionally ordered helical interwoven structure was synthesized by a nano-casting method using KIT-6 as the hard template. The obtained LaCoO3-Meso with high surface area was tested for its catalytic performance in the NOx storage and reduction (NSR) reaction and compared with a sample synthesized by the conventional sol-gel method. The LaCoO3-Meso showed a significant advantage for NOx storage, with a NOx storage capacity 2 times higher than the regular sample. LaCoO3-Meso also exhibited improved NSR catalytic performance in the 150-450 degrees C temperature range, especially within 350-400 degrees C, where the NOx conversion was raised for 40%. The results of X-ray photoelectron spectroscopy and X-ray absorption fine structure measurements suggested the presence of a high concentration of oxygen defects on the LaCoO3-Meso surface. Further results provided by temperature programmed reduction and temperature programmed desorption indicated that the oxygen defects not only increase the amount of trapped NOx , but also improve the low-temperature redox performance of the catalyst. The lower stability of NOx species adsorbed on oxygen defects promotes the NOx release step in the NSR reaction and benefits the regeneration of storage sites. |
| Department | 大气环境与污染控制实验室 ; 大气环境与污染控制实验室 |
| Keyword | LEAN/RICH ATMOSPHERES SURFACE-AREA ACTIVE-SITES OXIDATION REGENERATION PARTICLES TOLERANCE REMOVAL TOLUENE SILICA |
| Document Type | 期刊论文 |
| Identifier | https://ir.rcees.ac.cn/handle/311016/47420 |
| Collection | 大气环境与污染控制实验室 |
| Affiliation | 1.Chinese Acad Sci, Res Ctr Ecoenvironm Sci, State Key Joint Lab Environm Simulat & Pollut Con, Beijing 100085, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 3.Chinese Acad Sci, Ctr Excellence Reg Atmospher Environm, Inst Urban Environm, Xiamen 361021, Peoples R China 4.Chinese Acad Sci, Ganjiang Innovat Acad, Ganzhou 341000, Peoples R China |
| Recommended Citation GB/T 7714 | Xie, Wen,Xu, Guangyan,Zhang, Yan,et al. Mesoporous LaCoO3 perovskite oxide with high catalytic performance for NOx storage and reduction[J]. JOURNAL OF HAZARDOUS MATERIALS,2022,431(0):128528. |
| APA | Xie, Wen,Xu, Guangyan,Zhang, Yan,Yu, Yunbo,&He, Hong.(2022).Mesoporous LaCoO3 perovskite oxide with high catalytic performance for NOx storage and reduction.JOURNAL OF HAZARDOUS MATERIALS,431(0),128528. |
| MLA | Xie, Wen,et al."Mesoporous LaCoO3 perovskite oxide with high catalytic performance for NOx storage and reduction".JOURNAL OF HAZARDOUS MATERIALS 431.0(2022):128528. |
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| Mesoporous LaCoO3 pe（7630KB） | 期刊论文 | 出版稿 | 开放获取 | CC BY-NC-SA | View Application Full Text | |
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