Imaging the incipient electrochemical oxidation of highly oriented pyrolytic graphite

Imaging the incipient electrochemical oxidation of highly oriented pyrolytic graphite

The surface changes associated with the earliest stages of oxidation of basal plane highly oriented pyrolytic graphite (HOPG) electrode surfaces are examined. Atomic force microscopy, optical microscopy and scanning electron microscopy show that the surface blisters formed by application of potentia...

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Veröffentlicht in:Analytical chemistry (Washington) 1993-05, Vol.65 (10), p.1378-1389
Hauptverfasser: Goss, Charles A, Brumfield, Jay C, Irene, Eugene A, Murray, Royce W
Format: Artikel
Sprache:eng
Schlagworte:
Chemistry
Electrochemistry
Electrodes: preparations and properties
Exact sciences and technology
General and physical chemistry
Graphite
Kinetics
Other electrodes
Oxidation
Scientific imaging
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Zusammenfassung:The surface changes associated with the earliest stages of oxidation of basal plane highly oriented pyrolytic graphite (HOPG) electrode surfaces are examined. Atomic force microscopy, optical microscopy and scanning electron microscopy show that the surface blisters formed by application of potentials from positive 1.5 to positive 1.63 V vs SSCE in 1.0 m KNO3 are from 20 to 1,000 nm high and from 0.5 to 50 micrometers at the base.
ISSN:0003-2700
1520-6882
DOI:10.1021/ac00058a014