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  Adsorption and desorption of oxygen and nitrogen on PdCu(110) single crystal alloy surfaces

Mousa, M. S., Loboda-Cackovic, J., Jaenicke, S., & Block, J. H. (1994). Adsorption and desorption of oxygen and nitrogen on PdCu(110) single crystal alloy surfaces. Surface Science, 307-309(A), 401-406. doi:10.1016/0039-6028(94)90426-X.

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 Creators:
Mousa, M. S.1, 2, Author           
Loboda-Cackovic, J.1, Author           
Jaenicke, S.3, Author
Block, Jochen H.1, Author           
Affiliations:
1Fritz Haber Institute, Max Planck Society, ou_24021              
2Department of Physics, Mu'tah University, P. O. Box 7, Al-Karak, Jordan, ou_persistent22              
3Department of Chemistry, National University of Singapore, Singapore, ou_persistent22              

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 Abstract: LEED, AES and TDS were used to study the chemisorption of oxygen and nitrogen on specially prepared Pd-rich alloy surfaces. CuPd ratios of ⩽ 0.4 were determined by AES for a four-layer surface region (SR); the top layer (TL) composition was ~ 100% Pd, obtained by CO TDS as characterisation method. This enabled the average ratio of CuPd in the next three subsurface layers (3SSL) to be evaluated. Oxygen and nitrogen were adsorbed at 115 K and TDS were obtained for temperatures up to ~ 500 K. Oxygen desorption from the alloy surfaces showed one peak at 144 K. The TDS saturated at ~ 9 L. Different types of adsorbate structures were obtained depending on the CuPd (SR) ratio and the lattice type (fcc or bcc). Oxygen adsorption on the (1 × 1) clean surface developed two structures, depending on the ratio of the CuPd (SR). For values ⩽ 0.1, a c(2 × 4) structure appeared at room temperature (RT), while a reconstructed (1 × 2) pattern appeared at 120 K for a CuPd(SR) of ~ 0.4. Nitrogen adsorption on surfaces with a CuPd(SR) of ⩽ 0.1 showed only a (1 × 1) surface structure. TDS of nitrogen with one maximum at 130 K saturated at ~ 1 L.

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Language(s): eng - English
 Dates: 1994-04-20
 Publication Status: Issued
 Pages: 6
 Publishing info: -
 Table of Contents: -
 Rev. Type: Peer
 Identifiers: DOI: 10.1016/0039-6028(94)90426-X
 Degree: -

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Title: Surface Science
  Abbreviation : Surf. Sci.
Source Genre: Journal
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Publ. Info: Amsterdam : Elsevier
Pages: 6 Volume / Issue: 307-309 (A) Sequence Number: - Start / End Page: 401 - 406 Identifier: ISSN: 0039-6028
CoNE: https://pure.mpg.de/cone/journals/resource/0039-6028