In Situ Visualization and Mechanistic Understandings on Facet-Dependent Atomic Redispersion of Platinum on CeO2
文献类型：期刊论文
| 作者 | Zhang, Lei1,2; Niu, Yiming2,3; Pu, Yinghui2,3; Wang, Yongzhao2,3; Dong, Shaoming2,3; Liu, Yuefeng4; Zhang, Bingsen2,3; Liu, Zhong-Wen1 |
| 刊名 | NANO LETTERS
 |
| 出版日期 | 2023-12-15 |
| 卷号 | 23期号:24页码:11999-12005 |
| 关键词 | redispersion mechanism facet effect singleatom catalyst in situ TEM Pt/CeO2 |
| ISSN号 | 1530-6984 |
| DOI | 10.1021/acs.nanolett.3c04008 |
| 通讯作者 | Niu, Yiming(ymniu14b@imr.ac.cn) ; Zhang, Bingsen(bszhang@imr.ac.cn) ; Liu, Zhong-Wen(zwliu@snnu.edu.cn) |
| 英文摘要 | Redispersion is an effective method for regeneration of sintered metal-supported catalysts. However, the ambiguous mechanistic understanding hinders the delicate controlling of active metals at the atomic level. Herein, the redispersion mechanism of atomically dispersed Pt on CeO2 is revealed and manipulated by in situ techniques combining well-designed model catalysts. Pt nanoparticles (NPs) sintered on CeO2 nano-octahedra under reduction and oxidation conditions, while redispersed on CeO2 nanocubes above similar to 500 degrees C in an oxidizing atmosphere. The dynamic shrinkage and disappearance of Pt NPs on CeO2 (100) facets was directly visualized by in situ TEM. The generated atomically dispersed Pt with the square-planar [PtO4](2+) structure on CeO2 (100) facets was also confirmed by combining Cs-corrected STEM and spectroscopy techniques. The redispersion and atomic control were ascribed to the high mobility of PtO2 at high temperatures and its strong binding with square-planar O-4 sites over CeO2 (100). These understandings are important for the regulation of atomically dispersed platinum catalysts. |
| 资助项目 | National Natural Science Foundation of China[22072164] ; National Natural Science Foundation of China[22002173] ; National Natural Science Foundation of China[52161145403] ; China Postdoctoral Science Foundation[2020M680999] ; LiaoNing Revitalization Talents Program[XLYC1807175] ; Foundations of Shenyang National Laboratory for Materials Science |
| WOS研究方向 | Chemistry ; Science & Technology - Other Topics ; Materials Science ; Physics |
| 语种 | 英语 |
| WOS记录号 | WOS:001133413500001 |
| 出版者 | AMER CHEMICAL SOC |
| 资助机构 | National Natural Science Foundation of China ; China Postdoctoral Science Foundation ; LiaoNing Revitalization Talents Program ; Foundations of Shenyang National Laboratory for Materials Science |
| 源URL |  |
| 专题 | 金属研究所_中国科学院金属研究所 |
| 通讯作者 | Niu, Yiming; Zhang, Bingsen; Liu, Zhong-Wen |
| 作者单位 | 1.Shaanxi Normal Univ, Sch Chem & Chem Engn, Key Lab Syngas Convers Shaanxi Prov, Xian 710119, Peoples R China 2.Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, Shenyang 110016, Peoples R China 3.Univ Sci & Technol China, Sch Mat Sci & Engn, Shenyang 110016, Peoples R China 4.Chinese Acad Sci, Dalian Inst Chem Phys, Dalian Natl Lab Clean Energy, Dalian 116023, Peoples R China |
| 推荐引用方式 GB/T 7714 | Zhang, Lei,Niu, Yiming,Pu, Yinghui,et al. In Situ Visualization and Mechanistic Understandings on Facet-Dependent Atomic Redispersion of Platinum on CeO2[J]. NANO LETTERS,2023,23(24):11999-12005. |
| APA | Zhang, Lei.,Niu, Yiming.,Pu, Yinghui.,Wang, Yongzhao.,Dong, Shaoming.,...&Liu, Zhong-Wen.(2023).In Situ Visualization and Mechanistic Understandings on Facet-Dependent Atomic Redispersion of Platinum on CeO2.NANO LETTERS,23(24),11999-12005. |
| MLA | Zhang, Lei,et al."In Situ Visualization and Mechanistic Understandings on Facet-Dependent Atomic Redispersion of Platinum on CeO2".NANO LETTERS 23.24(2023):11999-12005. |
入库方式： OAI收割
来源：金属研究所
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