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Stabilization and transformation of Pt nanocrystals supported on ZnAl2O4 spinel
Li, Wei-Zhen1,3; Kovarik, Libor1; Cheng, Yingwen1; Nie, Lei1; Bowden, Mark E.1; Liu, Jun1; Wang, Yong1,2
刊名RSC ADVANCES
2017
DOI10.1039/c6ra26159k
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
关键词[WOS]PLATINUM NANOPARTICLES ; CATALYSTS ; SILICA ; OXIDE
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.
语种英语
WOS记录号WOS:000393749200029
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被引频次:2[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://cas-ir.dicp.ac.cn/handle/321008/151889
专题中国科学院大连化学物理研究所
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
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GB/T 7714
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.
APA Li, Wei-Zhen.,Kovarik, Libor.,Cheng, Yingwen.,Nie, Lei.,Bowden, Mark E..,...&Wang, Yong.(2017).Stabilization and transformation of Pt nanocrystals supported on ZnAl2O4 spinel.RSC ADVANCES,7(6),3282-3286.
MLA Li, Wei-Zhen,et al."Stabilization and transformation of Pt nanocrystals supported on ZnAl2O4 spinel".RSC ADVANCES 7.6(2017):3282-3286.
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