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Abstract

gas evolution behaviour of ruthenium dioxide activated metal anodes. The initial work was carried with titanium supported electrocatalysts (much longer service life values in base with nickel supported oxide systems). At elevated temperature (80 degrees C) and concentrated base (6.0 mol dm**- 3- NaOH) RuO-2 can maintain its low Tafel slope (delta-E/delta-log-i about 46 mV decade -1-) right up to the limiting current density of ca. 1.0 A cm -2-.PR5 In an attempt to obtain improved anode performance the behaviour of mixed oxide coatings was examined. Service life values increased on replacing titanium by nickel, and higher values still were observed with some RuO-2 - SnO-2 sandwich oxide mixtures. The major cause of deterioration of RUO-2 based anode coating is slow dissolution of RuO-2 species which microcrystalline oxide film. It would be desirable in future studies to identify (a) what mixed oxide electrocatalysts have the highest corrosion (RuO-2 loss) resistance, (b) better procedures for bonding the

Additional information

Authors: BURKE L D UNIVERSITY COLLEGE CORK (IRELAND), UNIVERSITY COLLEGE CORK (IRELAND)
Bibliographic Reference: EUR 9563 EN (1984) MF, 83 P., BFR 120, BLOW-UP COPY BFR 415, EUROFFICE, LUXEMBOURG, POB 1003
Availability: Can be ordered online
Record Number: 1989123038900 / Last updated on: 1987-01-01
Category: PUBLICATION
Available languages: en