Interface-Confined FeOx Adlayers Induced by Metal Support Interaction in Pt/FeOx Catalysts | |
Xu, Xuejun1,2; Fu, Qiang1; Gan, Lin2; Zhu, Jing3; Bao, Xinhe1 | |
刊名 | JOURNAL OF PHYSICAL CHEMISTRY B
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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. |
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