Unravelling the Effect of Oxygen on the Sintering Mechanism of Pt/CeO<sub>2</sub> in the CO Oxidation Reaction

doi:10.1021/acs.jpclett.4c02935

IMR OpenIR

	Unravelling the Effect of Oxygen on the Sintering Mechanism of Pt/CeO₂ in the CO Oxidation Reaction
	Zhang, Lei 1,2; Niu, Yiming 1,3; Pu, Yinghui 1,3; Wang, Yongzhao 1,3; Dong, Shaoming 1,3; Liu, Zhong-Wen 2; Zhang, Bingsen 1,3
通讯作者	Niu, Yiming(ymniu14b@imr.ac.cn) ; Liu, Zhong-Wen(zwliu@snnu.edu.cn) ; Zhang, Bingsen(bszhang@imr.ac.cn)
	2024-12-18
发表期刊	JOURNAL OF PHYSICAL CHEMISTRY LETTERS
ISSN	1948-7185
页码	7
摘要	Sintering significantly contributes to the deactivation of supported metal catalysts under reaction conditions, influenced by various factors, including temperature, atmosphere, and metal-support interactions. The sintering mechanism under the reaction conditions remains complex and ambiguous. This study delves into the sintering behavior of platinum on CeO2 under CO oxidation conditions, mainly employing transmission electron microscopy to elucidate the effects of different gas components on the sintering mechanism at elevated temperatures. An atmosphere rich in oxygen promotes the sintering of Pt via the Ostwald ripening mechanism, characterized by the growth of larger nanoparticles at the expense of smaller ones. Conversely, sintering proceeds through particle migration and coalescence in the absence of oxygen, leading to the aggregation of nanoparticles. The obtained Pt/CeO2 catalysts exhibit enhanced catalytic performance after treatment with argon and stoichiometric reaction gases, contrasting with the deactivation observed under oxygen-rich conditions, which is attributed to varied Pt valence states. These findings provide insights into understanding the sintering mechanisms and inform the design of heterogeneous catalysts.
资助者	National Natural Science Foundation of China ; National Natural Science Foundation of China ; Natural Science Foundation of Liaoning Province ; Foundations of Shenyang National Laboratory for Materials Science
DOI	10.1021/acs.jpclett.4c02935
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[2022-MS-004] ; Natural Science Foundation of Liaoning Province ; 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, Physical ; Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary ; Physics, Atomic, Molecular & Chemical
WOS记录号	WOS:001379982200001
出版者	AMER CHEMICAL SOC
引用统计	被引频次：2[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/321006/181155
专题	中国科学院金属研究所
通讯作者	Niu, Yiming; Liu, Zhong-Wen; Zhang, Bingsen
作者单位	1.Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, Shenyang 110016, Peoples R China 2.Shaanxi Normal Univ, Sch Chem & Chem Engn, Key Lab Syngas Convers Shaanxi Prov, Xian 710119, Peoples R China 3.Univ Sci & Technol China, Sch Mat Sci & Engn, Shenyang 110016, Peoples R China
推荐引用方式 GB/T 7714	Zhang, Lei,Niu, Yiming,Pu, Yinghui,et al. Unravelling the Effect of Oxygen on the Sintering Mechanism of Pt/CeO₂ in the CO Oxidation Reaction[J]. JOURNAL OF PHYSICAL CHEMISTRY LETTERS,2024:7.
APA	Zhang, Lei.,Niu, Yiming.,Pu, Yinghui.,Wang, Yongzhao.,Dong, Shaoming.,...&Zhang, Bingsen.(2024).Unravelling the Effect of Oxygen on the Sintering Mechanism of Pt/CeO₂ in the CO Oxidation Reaction.JOURNAL OF PHYSICAL CHEMISTRY LETTERS,7.
MLA	Zhang, Lei,et al."Unravelling the Effect of Oxygen on the Sintering Mechanism of Pt/CeO₂ in the CO Oxidation Reaction".JOURNAL OF PHYSICAL CHEMISTRY LETTERS (2024):7.