In situ study of ceria trapping Pt cluster under heating condition and the resulted strong metal‒support interaction effect in CO oxidation

doi:10.26434/chemrxiv-2024-j9mcq

	In situ study of ceria trapping Pt cluster under heating condition and the resulted strong metal‒support interaction effect in CO oxidation
	Zhu, Liang; Liu, Yang; Vovk, Evgeny I.; Jiang, Yilan; Wang, Danyu; Qiu, Zhehao; Lang, Junyu; Wang, Yixiao; Yang, Yong
	2024-11-05
状态	已发表
摘要	The synergistic relationship between platinum (Pt) and ceria support is vital for advancing the innovative design of Pt/ceria catalyst, which extensively applied in the fields of energy conversion and environmental remediation. Through thermal treatment, A serial of Pt/ceria with different metal support interaction were obtained. Advanced analyses employing in situ transmission electron microscopy (TEM) and X-ray Photon-electron Spectroscopy (XPS) elucidated that these thermal methods provoke a marked affinity between the Pt clusters and ceria support. High-temperature treatment can result in partial encapsulation of Pt clusters by CeO₂, enabling the Pt clusters to match to the CeO₂ lattice. Notably, high-temperature treatments lead to the partial encapsulation of Pt clusters by CeO₂, facilitating alignment of the Pt clusters with the CeO₂ lattice. This results in the emergence of oxidized Pt (Pt4+), which replaces the initial metallic Pt0, embedding itself onto the ceria support and subsequently activating adjacent Ce atoms in proximity to Pt. This innovative structure creates more site for CO adsorption but with weaker adsorption energy, effectively eliminating CO poisoning on the Pt surface and enhancing O₂ dissociative adsorption. Collectively, these modifications birth a catalyst exhibiting remarkable proficiency in low-temperature CO oxidation.
关键词	CO oxidation Pt/CeO₂ interface in situ characterization strong metal-support interaction
语种	英语
DOI	10.26434/chemrxiv-2024-j9mcq
相关网址	查看原文
出处	chemRxiv
收录类别	PPRN.PPRN
WOS记录号	PPRN:119093367
WOS类目	Chemistry, Multidisciplinary
资助项目	Analytical Instrumentation Center, SPST, ShanghaiTech University[SPST-AIC10112914] ; Ministry of Science and Technology (National key R&D Program of China)[2023YFB4005200] ; National Natural Science Foundation of China["22272107","22072092"]
文献类型	预印本
条目标识符	https://kms.shanghaitech.edu.cn/handle/2MSLDSTB/464722
专题	物质科学与技术学院物质科学与技术学院_PI研究组_杨永组物质科学与技术学院_公共科研平台_物质科学电镜平台物质科学与技术学院_博士生大科学中心_PI研究组_王依宵组
通讯作者	Lang, Junyu; Wang, Yixiao; Yang, Yong
作者单位	ShanghaiTech Univ, Sch Phys Sci & Technol, Shanghai 200120, Peoples R China
推荐引用方式 GB/T 7714	Zhu, Liang,Liu, Yang,Vovk, Evgeny I.,et al. In situ study of ceria trapping Pt cluster under heating condition and the resulted strong metal‒support interaction effect in CO oxidation. 2024.