Revealing the nature and number of active centers on metal surfaces with electrochemical scanning tunnel microscope

Measurements with scanning tunnel microscope are analyzed, as regards the relative number and properties of tunnel-active centers at metal surfaces (Pt single crystals, polycrystalline Rh, Pd, and Cu, highly oriented pyrolytic graphite, etc.), in particular, at controlled potential. The relative num...

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Veröffentlicht in:	Protection of metals 2005-01, Vol.41 (1), p.12-21
1. Verfasser:	Kasatkin, E V
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description	Measurements with scanning tunnel microscope are analyzed, as regards the relative number and properties of tunnel-active centers at metal surfaces (Pt single crystals, polycrystalline Rh, Pd, and Cu, highly oriented pyrolytic graphite, etc.), in particular, at controlled potential. The relative number and local properties of the tunnel-active sites, their tunnel conductance, and donor-acceptor properties are calculated. A tunnel exchange current observed, similar to the exchange current of electrochemical reactions, reflects reversible charge transfer across the interface showing equal rates of the forward and backward processes. A possible correlation between the tunnel and electrochemical stages of the charge transfer is discussed.[PUBLICATION ABSTRACT]
doi_str_mv	10.1007/s11124-005-0002-7
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title	Revealing the nature and number of active centers on metal surfaces with electrochemical scanning tunnel microscope
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