POTENTIAL-DEPENDENT SURFACE SEGREGATION IN LEAD PLUS RUTHENIUM PYROCHLORE PB2RU2O7-Y

Date

1993-07-01

Author

Gökağaç Arslan, Gülsün
KENNEDY, BJ

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The effect of anodic polarization on the surface composition of Pb + Ru pyrochlore Pb2Ru2O7-y in acid and acid+alcohol solutions has been studied using cyclic voltammetry, scanning electron microscopy, energy dispersive analysis and X-ray photoelectron spectroscopy. In acidic solutions the surface is observed to be unstable to oxygen evolution even at reasonably low overpotentials. Lead is found to diffuse from the pyrochlore matrix resulting in the formation of small crystallites of PbO2 on the surface of a mixed Pb + Ru oxide substrate. RuO2 does not appear to form on the surface.

URI

https://hdl.handle.net/11511/99813

Journal

JOURNAL OF ELECTROANALYTICAL CHEMISTRY

DOI

https://doi.org/10.1016/0022-0728(93)80287-r

Collections

Department of Chemistry, Article

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Citation Formats

G. Gökağaç Arslan and B. KENNEDY, “POTENTIAL-DEPENDENT SURFACE SEGREGATION IN LEAD PLUS RUTHENIUM PYROCHLORE PB2RU2O7-Y,” JOURNAL OF ELECTROANALYTICAL CHEMISTRY, vol. 353, no. 1-2, pp. 71–80, 1993, Accessed: 00, 2022. [Online]. Available: https://hdl.handle.net/11511/99813.