Interface-Confined FeOx Adlayers Induced by Metal Support Interaction in Pt/FeOx Catalysts

doi:10.1021/acs.jpcb.7b07644

	Interface-Confined FeOx Adlayers Induced by Metal Support Interaction in Pt/FeOx Catalysts
	Xu, Xuejun 1,2; Fu, Qiang 1; Gan, Lin 2; Zhu, Jing 3; Bao, Xinhe 1
刊名	JOURNAL OF PHYSICAL CHEMISTRY B
	2018-01-18
卷号	122 期号:2 页码:984-990
ISSN号	1520-6106
DOI	10.1021/acs.jpcb.7b07644
文献子类	Article
英文摘要	Active oxide nanolayers can be stabilized on noble metal surfaces through interface confinement effect in oxide/metal inverse catalysts. Here, using normal metal/oxide catalysts we show that Fe oxide nanolayers can be confined on Pt nanoparticles (NPs) when treating a Pt/FeOx catalyst in Ar or H-2/O-2 atmospheres at elevated temperatures. Pt NPs partially covered with Fe oxide nanopatches are more active in CO oxidation than bare Pt NPs, while those with fully encapsulated Fe oxide shells in strong metal-support interaction (SMSI) state show much lower activity. Characterization results indicate that three steps play an important role in the formation of Fe oxide overlayers: Pt-aided reduction of interfacial Fe oxide, Pt alloying of interfacial Fe atoms, and surface segregation of alloyed Fe atoms onto surface of Pt NPs. Active surface oxides in so-called support-metal interface confinement (SMIC) state and fully encapsulated oxide layers in the SMSI state can be sequentially produced which depend on the treatment conditions.
WOS关键词	TEMPERATURE CO OXIDATION ; OXIDE NANOSTRUCTURES ; GOLD NANOPARTICLES ; FERROUS CENTERS ; MODEL SYSTEMS ; ACTIVE-SITES ; NOBLE-METALS ; SURFACES ; METHANOL ; HYDROGENATION
WOS研究方向	Chemistry
语种	英语
出版者	AMER CHEMICAL SOC
WOS记录号	WOS:000423140600072
内容类型	期刊论文
源URL	[http://cas-ir.dicp.ac.cn/handle/321008/168600]
专题	大连化学物理研究所_中国科学院大连化学物理研究所
通讯作者	Fu, Qiang; Bao, Xinhe
作者单位	1.Chinese Acad Sci, Dalian Inst Chem Phys, State Key Lab Catalysis, Dalian 116023, Peoples R China 2.Tsinghua Univ, Grad Sch Shenzhen, Div Energy & Environm, Shenzhen 518055, Peoples R China 3.Tsinghua Univ, Sch Mat Sci & Engn, Beijing Natl Ctr Electron Microscopy, Beijing 100084, Peoples R China
推荐引用方式 GB/T 7714	Xu, Xuejun,Fu, Qiang,Gan, Lin,et al. Interface-Confined FeOx Adlayers Induced by Metal Support Interaction in Pt/FeOx Catalysts[J]. JOURNAL OF PHYSICAL CHEMISTRY B,2018,122(2):984-990.
APA	Xu, Xuejun,Fu, Qiang,Gan, Lin,Zhu, Jing,&Bao, Xinhe.(2018).Interface-Confined FeOx Adlayers Induced by Metal Support Interaction in Pt/FeOx Catalysts.JOURNAL OF PHYSICAL CHEMISTRY B,122(2),984-990.
MLA	Xu, Xuejun,et al."Interface-Confined FeOx Adlayers Induced by Metal Support Interaction in Pt/FeOx Catalysts".JOURNAL OF PHYSICAL CHEMISTRY B 122.2(2018):984-990.