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学科主题: 物理化学
题名: Reversible structural transformation of FeOx nanostructures on Pt under cycling redox conditions and its effect on oxidation catalysis
作者: Fu, Qiang1;  Yao, Yunxi1;  Guo, Xiaoguang1;  Wei, Mingming1;  Ning, Yanxiao1;  Liu, Hongyang1, 2;  Yang, Fan1;  Liu, Zhi3;  Bao, Xinhe1
通讯作者: 傅强 ;  包信和
刊名: PHYSICAL CHEMISTRY CHEMICAL PHYSICS
发表日期: 2013
DOI: 10.1039/c3cp52587b
卷: 15, 期:35, 页:14708-14714
收录类别: SCI
合作性质: 
文章类型: Article
部门归属: 5
项目归属: 502
产权排名: 待补充
WOS标题词: Science & Technology ;  Physical Sciences
类目[WOS]: Chemistry, Physical ;  Physics, Atomic, Molecular & Chemical
资助者: 1,1
研究领域[WOS]: Chemistry ;  Physics
英文摘要: Understanding dynamic changes of catalytically active nanostructures under reaction conditions is a pivotal challenge in catalysis research, which has been extensively addressed in metal nanoparticles but is less explored in supported oxide nanocatalysts. Here, structural changes of iron oxide (FeOx) nanostructures supported on Pt in a gaseous environment were examined by scanning tunneling microscopy, ambient pressure X-ray photoelectron spectroscopy, and in situ X-ray absorption spectroscopy using both model systems and real catalysts. O-Fe (FeO) bilayer nanostructures can be stabilized on Pt surfaces in reductive environments such as vacuum conditions and H-2-rich reaction gas, which are highly active for low temperature CO oxidation. In contrast, exposure to H-2-free oxidative gases produces a less active O-Fe-O (FeO2) trilayer structure. Reversible transformation between the FeO bilayer and FeO2 trilayer structures can be achieved under alternating reduction and oxidation conditions, leading to oscillation in the catalytic oxidation performance.
关键词[WOS]: TEMPERATURE CO OXIDATION ;  OXIDE-FILMS ;  PHOTOELECTRON-SPECTROSCOPY ;  FERROUS CENTERS ;  PT(111) SURFACE ;  IN-SITU ;  NANOPARTICLES ;  CHEMISTRY ;  AU(111) ;  GROWTH
语种: 英语
原文出处: 查看原文
WOS记录号: WOS:000323196800018
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/119185
Appears in Collections:中国科学院大连化学物理研究所_期刊论文

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作者单位: 1.Chinese Acad Sci, Dalian Inst Chem Phys, State Key Lab Catalysis, Dalian 116023, Peoples R China
2.Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, Shenyang 110016, Peoples R China
3.Univ Calif Berkeley, Lawrence Berkeley Natl Lab, Adv Light Source, Berkeley, CA 94720 USA

Recommended Citation:
Fu, Qiang,Yao, Yunxi,Guo, Xiaoguang,et al. Reversible structural transformation of FeOx nanostructures on Pt under cycling redox conditions and its effect on oxidation catalysis[J]. PHYSICAL CHEMISTRY CHEMICAL PHYSICS,2013,15(35):14708-14714.
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