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北京石油化工学院2026年研究生招生接收调剂公告
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csfn

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[交流] 【分享】9月25日的science:Al3+ as binding sites for Pt on Al2O3

abstract:
In many heterogeneous catalysts, the interaction of metal particles with their oxide support can alter the electronic properties of the metal and can play a critical role in determining particle morphology and maintaining dispersion. We used a combination of ultrahigh magnetic field, solid-state magic-angle spinning nuclear magnetic resonance spectroscopy, and high-angle annular dark-field scanning transmission electron microscopy coupled with density functional theory calculations to reveal the nature of anchoring sites of a catalytically active phase of platinum on the surface of a g-Al2O3 catalyst support material. The results obtained show that coordinatively unsaturated pentacoordinate Al3+ (Al3+ penta) centers present on the (100) facets of the g-Al2O3 surface are anchoring Pt. At low loadings, the active catalytic phase is atomically dispersed on the support surface (Pt/Al3+ penta = 1), whereas two-dimensional Pt rafts form at higher coverages.

title:Coordinatively Unsaturated Al3+ Centers as Binding Sites for Active Catalyst Phases of Platinum on g-Al2O3
from :25 SEPTEMBER 2009 VOL 325 SCIENCE


link:http://www.sciencemag.org/cgi/content/abstract/325/5948/1670

[ Last edited by mingdong on 2009-12-9 at 08:21 ]
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3楼2009-09-28 01:03:35
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Originally posted by csfn at 2009-9-25 09:35:
abstract:
In many heterogeneous catalysts, the interaction of metal particles with their oxide support can alter the electronic properties of the metal and can play a critical role in determining ...

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4楼2009-09-28 01:05:15
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csfn

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Originally posted by fegg7502 at 2009-9-28 01:05:

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5楼2009-09-28 07:54:38
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