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  Alumina supported model Pd–Ag catalysts: A combined STM, XPS, TPD and IRAS study

Khan, N. A., Uhl, A., Shaikhutdinov, S. K., & Freund, H.-J. (2006). Alumina supported model Pd–Ag catalysts: A combined STM, XPS, TPD and IRAS study. Surface Science, 600(9), 1849-1853. doi:10.1016/j.susc.2006.02.016.

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 Creators:
Khan, Neetha A.1, Author           
Uhl, Alexander1, Author           
Shaikhutdinov, Shamil K.1, Author           
Freund, Hans-Joachim1, Author           
Affiliations:
1Chemical Physics, Fritz Haber Institute, Max Planck Society, ou_24022              

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Free keywords: XPS; STM; IRAS; Bimetallic; Palladium; Silver; CO
 Abstract: The bimetallic Pd–Ag model catalysts were prepared by physical vapor deposition on thin alumina films. The morphology and structure of the Pd–Ag particles were studied by STM, XPS, and by TPD and IRAS of CO. The results showed the formation of true alloy particles with Ag segregated at the surface. The addition of Ag first suppresses the most strongly bonded CO on threefold hollow sites of Pd. With further increasing Ag coverage, only isolated Pd atoms surrounded by Ag atoms are likely present on the surface. The results on CO adsorption suggest that the model Pd–Ag system mimics the structure of the real Pd–Ag catalysts.

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Title: Surface Science
  Alternative Title : Surf. Sci.
Source Genre: Journal
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Pages: - Volume / Issue: 600 (9) Sequence Number: - Start / End Page: 1849 - 1853 Identifier: -