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Adsorption properties of a mixed surface studied by high resolution core level photoemission : CO/0.5 ML Pd/Rh(111)

In English

Författare

Summary, in English

The coverage-dependent adsorption properties of a laterally heterogeneous bimetallic surface have been investigated by high resolution core level photoemission and low energy electron diffraction. The specific system under study was CO adsorbed on a Rh(111) surface onto which 2D Pd islands (coverage 0.5 ML) were formed by vapor deposition. The CO adsorption properties of the heterogeneous surface were compared with CO adsorption on a Rh(111) surface covered with a full Pd monolayer and with previous results for the CO/Rh(111) system. For low exposures CO is only found on the Rh(111) patches which can be explained by diffusion of CO from the Pd islands onto Rh parts in the adsorption process. At higher exposures CO diffusion from Rh to Pd is indicated. The origin of the diffusion processes can be found in the different coverage-dependent CO adsorption energies on the two surface parts.

Publiceringsår

1998-08-11

Språk

Engelska

Sidor

111-122

Publikation/Tidskrift/Serie

Surface Science

Volym

411

Issue

1-2

Dokumenttyp

Artikel i tidskrift

Förlag

Elsevier

Ämne

  • Accelerator Physics and Instrumentation

Nyckelord

  • Carbon monoxide
  • Chemisorption
  • LEED
  • Palladium
  • Rhodium
  • Single crystal surfaces
  • Soft X-ray photoelectron spectroscopy
  • Surface diffusion

Status

Published

ISBN/ISSN/Övrigt

  • ISSN: 0039-6028