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题名: Stabilization and transformation of Pt nanocrystals supported on ZnAl2O4 spinel
作者: Li, Wei-Zhen1, 3;  Kovarik, Libor1;  Cheng, Yingwen1;  Nie, Lei1;  Bowden, Mark E.1;  Liu, Jun1;  Wang, Yong1, 2
刊名: RSC ADVANCES
发表日期: 2017
DOI: 10.1039/c6ra26159k
卷: 7, 期:6, 页:3282-3286
收录类别: SCI
文章类型: Article
WOS标题词: Science & Technology ;  Physical Sciences
类目[WOS]: Chemistry, Multidisciplinary
研究领域[WOS]: Chemistry
英文摘要: The role of interfacial interaction on the stabilization and transformation of Pt nanocrystals supported on zinc aluminate (ZnAl2O4) was systematically studied in this work. In addition to the remarkable stability of Pt nanocrystals supported on the {111} ZnAl2O4 facet under a harsh oxidizing atmosphere, we also identified the phase segregation of ZnAl2O4 to ZnO and Al2O3 and the transformation of Pt to PtZn bimetallic alloy for Pt supported on other facets. High resolution scanning transmission electron microscopy and X-ray diffraction analyses reveal the phase segregation is associated with a cation migration mechanism associated with replacement of Zn2+ by Al3+ in the spinel structure. This work confirms the strong interfacial interactions between precious metal nanocrystals and that the spinel support is a general mechanism for stabilizing precious metal catalysts, with important implications for the rational design of stable integrated catalysis systems.
关键词[WOS]: PLATINUM NANOPARTICLES ;  CATALYSTS ;  SILICA ;  OXIDE
语种: 英语
WOS记录号: WOS:000393749200029
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/151889
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.Pacific Northwest Natl Lab, Inst Integrated Catalysis, POB 999, Richland, WA 99352 USA
2.Washington State Univ, Gene & Linda Voiland Sch Chem Engn & Bioengn, Pullman, WA 99164 USA
3.Chinese Acad Sci, Dalian Inst Chem Phys, State Key Lab Catalysis, Dalian 116023, Peoples R China

Recommended Citation:
Li, Wei-Zhen,Kovarik, Libor,Cheng, Yingwen,et al. Stabilization and transformation of Pt nanocrystals supported on ZnAl2O4 spinel[J]. RSC ADVANCES,2017,7(6):3282-3286.
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