Electrolytically co-deposited platinum-gold electrodes and their electrocatalytic activity for acetate ion oxidation

✍ Scribed by R. Woods

• Publisher: Elsevier Science
• Year: 1969
• Tongue: English
• Weight: 588 KB
• Volume: 14
• Category: Article
• ISSN: 0013-4686
• DOI: 10.1016/0013-4686(69)87039-8

✦ Synopsis

Voltammogs of electrolytically mdeposited platinulrr-gold electrodes are characteristic of separation into two surfaces having the hydrogm and oxygen electrosorption properties of the pure individual metals. X-ray ditfractton studies are interpreted by assuming phase separation into a platinum phase with crystallite sire less than 50 A and an alloy phase of varying composition. Continuous potential cycling of an electrode results in an increase in the crystallite stre of the platinum phase and a decrease in its surface area. The specific electrocatalytic activity of the platinum phase for acetate oxidation is equal to that obtained previously for platinum electrodes of various roughness. RksmabLes courbes voltam&riques des &ctrodes platine-or co-&ctrodepos&s sont caracteristiques dune s6paration en deux surfaces ayant les propri&Q d%lectrosorption de l'hydrogene de l'oxyg&ne des metaux puts individuels. Les etudes de diffraction-X sent interpr&es en supposant