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Formation and reduction of the oxygen layer on cold-worked platinum-gold alloys in acid solutions

✍ Scribed by M.W. Breiter


Publisher
Elsevier Science
Year
1965
Tongue
English
Weight
367 KB
Volume
10
Category
Article
ISSN
0013-4686

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✦ Synopsis


Periodic potentiostatic current/potential curves have been measured at 30Β°C on platinumgold alloys with gold contents from 5 to 70 at. % in N HsS04 and N HCIOp at 30 and 300 mV/s. The curves exhibit a characteristic shape with two reduction waves during the cathodic sweep, To a first approximation the current/potential curves can be considered to be composed additively of the respective curves of the pure metals under consideration of the gold content. R&sum&---Courbes courant-~~ntiel potenti~~tiqu~ p&iodiques d'alliages Pt-Au (5 a 70 at%) dans H,S04.N et HClO,.N a 3O"C, pour 30 et 300 mV.s-I. Leur forme eat caract&isBe par deux vagues de reduction en fonctionnement cathodique. En premiere approximation, compte-tenu de la teneur en Au, ees eourhes peuvent etre consid&es eomme composees additivement de eelles res~iv~ment propres 51 ehaeun des metaux ~onstituants. Zusanunenfassung-Periodische Stromspammngskurven warden potentiostatiseh hei 30Β°C an Platin-Gold-Legierungen mit Goldgehalten von 5 bis 70 Atomprozent in N H&SO4 nnd N HCI04 bei 30 und 300 mV/s gemessen. Die Kurven weisen einen ch~akteristi~hen Verlauf mit zwei Reduktionsst~en w&rend des kathodischen Durchganges auf. Die Stromspannungskurven kiinnen in erster Annlherung als additiv aus den Kurven der reinen Metalle unter Berticksichtigung des Goldgehaltes zusammengesetzt betrachtet werden.


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