<i>In Situ</i> Visualization and Mechanistic Understandings on Facet-Dependent Atomic Redispersion of Platinum on CeO<sub>2</sub>

doi:10.1021/acs.nanolett.3c04008

IMR OpenIR

	In Situ Visualization and Mechanistic Understandings on Facet-Dependent Atomic Redispersion of Platinum on CeO₂
	Zhang, Lei 1,2; Niu, Yiming 2,3; Pu, Yinghui 2,3; Wang, Yongzhao 2,3; Dong, Shaoming 2,3; Liu, Yuefeng 4; Zhang, Bingsen 2,3; Liu, Zhong-Wen 1
通讯作者	Niu, Yiming(ymniu14b@imr.ac.cn) ; Zhang, Bingsen(bszhang@imr.ac.cn) ; Liu, Zhong-Wen(zwliu@snnu.edu.cn)
	2023-12-15
发表期刊	NANO LETTERS
ISSN	1530-6984
卷号	23 期号:24 页码:11999-12005
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.
关键词	redispersion mechanism facet effect singleatom catalyst in situ TEM Pt/CeO2
资助者	National Natural Science Foundation of China ; China Postdoctoral Science Foundation ; LiaoNing Revitalization Talents Program ; Foundations of Shenyang National Laboratory for Materials Science
DOI	10.1021/acs.nanolett.3c04008
收录类别	SCI
语种	英语
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
WOS类目	Chemistry, Multidisciplinary ; Chemistry, Physical ; Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary ; Physics, Applied ; Physics, Condensed Matter
WOS记录号	WOS:001133413500001
出版者	AMER CHEMICAL SOC
引用统计	被引频次：14[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/183073
专题	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.