INITIAL DEALLOYING OF CU_3AU(111):AN IN-SITU X-RAY STUDY

摘要

For the understanding of corrosion or catalytic processes,knowledge about the detailed structure of metal surfaces is required.Binary metal alloys are in general of special interest because their properties can be tailored by their composition.However,in our natural environment,all materials are exposed to wet conditions,leading to the formation of thin layers of aqueous electrolyte,and contact potentials,e.g.between different metals,lead to electrochemical corrosion.Despite of keen interest,there is very little understanding of electrochemical processes on alloy surfaces on the atomic scale.This is mainly due to the lack of techniques that can resolve atomic structures in the presence of the electrolyte.