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Kwak, Ja Hun
Molecular Catalysis lab
Research Interests
  • Heterogeneous catalysis, molecular catalysis, ASlumima, zeolites

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Unique Role of Anchoring Penta-Coordinated Al3+ Sites in the Sintering of gamma-Al2O3-Supported Pt Catalysts

Cited 19 times inthomson ciCited 19 times inthomson ci
Title
Unique Role of Anchoring Penta-Coordinated Al3+ Sites in the Sintering of gamma-Al2O3-Supported Pt Catalysts
Other Titles
Unique Role of Anchoring Penta-Coordinated Al3+ Sites in the Sintering of gamma-Al2O3-Supported Pt Catalysts
Author
Mei, DonghaiKwak, JahunHu, JianzhiCho, Sung JuneSzanyi, JanosAllard, Lawrence F.Peden, Charles H. F.
Issue Date
2010-09
Publisher
AMER CHEMICAL SOC
Citation
JOURNAL OF PHYSICAL CHEMISTRY LETTERS, v.1, no.18, pp.2688 - 2691
Abstract
gamma-Al2O3-supported Pt group catalysts are widely used in many industrially important catalytic processes. However, gamma-Al2O3-supported Pt catalysts are prone to deactivation via metal sintering at high temperatures, in oxidative reaction environments, or both. Using a combination of experimental HRTEM and EXAFS measurements and theoretical DFT calculations, we find that pentacoordinated Al3+ sites (Al-p) on the gamma-Al2O3(100) surface can inhibit Pt sintering both thermodynamically and kinetically because of their strong interactions with atomic Pt or Pt oxide species. The present work suggests a promising approach for stabilizing the size and morphology of supported catalytically active phases
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DOI
10.1021/jz101073p
ISSN
1948-7185
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ECHE_Journal Papers
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