Enhanced Chemical Reactivity of Under-Coordinated Atoms at Pt−Rh Bimetallic Surfaces: A Spectroscopic Characterization

摘要: The electronic structure and chemical reactivity changes of highly under-coordinated Rh atoms on a Pt(111) surface versus coordination number were studied by combination synchrotron radiation core level photoemission spectroscopy density functional theory. properties adatoms are strongly modified the Pt substrate, when compared with equivalent atomic configuration in homometallic environment. A remarkable linear relationship is found between shifted spectral components, originating from different geometrical structures, corresponding induced d-band center shifts. This finding underscores relevance shifts as reliable experimental descriptors reactivity, also for bimetallic transition metal systems. availability an tool capable detecting local alloy configurations enhanced opens up possibility to investigate more complex systems...