Spatially Resolved Chemistry on Bimetallic Surfaces

• Authors: R. Behm
• Languages of publication: EN

Abstracts

EN

The local chemical properties of bimetallic surfaces, which are often drastically different from those of each of the components, will be discussed. Using CO adsorption as a probe molecule it will be shown for two model systems, Au/Pd(111) and Pt/Ru(0001), that their chemical properties depend decisively on the local surface structure and that the correct interpretation of area integrating spectroscopic and kinetic data obtained from such surfaces requires detailed knowledge of their (defect) structure and of the distribution of the different components in the surface layer. It will further be shown that information on the local chemical properties of specific structural elements such as monolayer islands and monolayer island edges, and specific surface ensembles can be gained by applying high resolution scanning tunneling microscopy imaging and area integrating spectroscopic techniques in combination to bimetallic surfaces whose morphology and composition is varied in a systematic and controlled way. Based on experimental results adsorption on a monolayer A / substrate B system is suggested as a model for gaining information on the modifications in chemical properties of AB alloy surfaces due to metal-metal interactions.

Keywords

EN

61.16.Ch; 68.10.Jy; 82.65.-i

• Publisher: Institute of Physics, Polish Academy of Sciences
• Journal: Acta Physica Polonica A
• Year: 1998
• Volume: 93
• Issue: 2
• Pages: 259-272

Dates

published

1998-02

Contributors

author

R. Behm

• Abt. Oberflächenchemie und Katalyse, Univ. Ulm, 89069 Ulm, Germany

Identifiers

DOI

10.12693/APhysPolA.93.259