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Surface core-level binding-energy shifts in hydrogen-adsorbed nickel-copper alloy

✍ Scribed by Badal C. Khanra; Sujata Modak

Publisher: Elsevier Science
Year: 1988
Tongue: English
Weight: 212 KB
Volume: 146
Category: Article
ISSN: 0009-2614
DOI: 10.1016/0009-2614(88)87478-5

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✦ Synopsis

The influence of adsorbates on the surface core-level binding-energy shifts in a Z,( Z+ 1) , _-x alloy system (Z being the atomic number) has been studied in terms of the equivalent core approximation (ECA) and an electronic theory of chemisorptioninduced surface segregation. For the H/Ni,$u, _Xsystem it has been shown that at low bulk Ni concentration the surface corelevel shift of Ni undergoes a sign reversal similar to the sign reversal in the heat of segregation found both theoretically and experimentally.

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