A MODEL FOR THE MUTUAL INFLUENCE OF CHEMISORPTION AND MULTILAYER SEGREGATION

Hui Zhang and Shulin Cong
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Hui Zhang: Department of Physics, Shenyang Normal College, Shenyang 113001, P. R. China
Shulin Cong: Department of Physics, Fushun Petroleum Institute, Fushun 110031, P. R. China

Surface Review and Letters (SRL), 1996, vol. 03, issue 02, 1253-1257

Abstract: The Green function method and the chemisorption theory of Einstein and Schrieffer are used to calculate the chemisorption energies ofOandCOon the multilayer segregated Ni-Cu disordered binary alloy within the many-coupled self-consistent coherent potential approximation. In general cases, the chemisorption-induced surface segregation can change the surface component and the chemisorption property to varying degrees. When the mutual influence of chemisorption and multilayer segregation is considered, the changes appear slightly mild. The chemisorption energy forO/Ni-Cu (CO/Ni-Cu)depends sensitively onO(CO)coverage θ, and decreases with increasing θ.

Date: 1996
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DOI: 10.1142/S0218625X96002266

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