Electrocatalytic oxidation of organic molecules in alkaline solutions—II. Electroadsorption and electrooxidation of ethylene glycol at platinum

✍ Scribed by E. Santos; M.C. Giordano

• Publisher: Elsevier Science
• Year: 1985
• Tongue: English
• Weight: 565 KB
• Volume: 30
• Category: Article
• ISSN: 0013-4686
• DOI: 10.1016/0013-4686(85)80144-4

✦ Synopsis

The eleccctrocataIytic oxidation of ethylene Blycol (EC) at polmstalline platinum in 1 M KOH was studied under potentiodynamic and potentiostatic conditions. EG electroadsorption processes v&e &arty distinguished from the oxidation of EC electroadsorbed residues by using the flux tezbnique after adsorption. The maximum adsorption potential was between 0.3 and 0.4V in the H-&atoms potential region. An electroadsorbed residue which oxidizes at more positive potentials was formed. The (eps), and (eP%x values were independently determined by the potentiostatic i/t transients at 0.35 V and the potentiodynamic oxidation profiles at low SW-rates respectively. The experimental values obtained allowed to postulate a plausible reaction pathway sequence. The comparison of EC with electroadsorbed 1,3 dioxolane and adsorbed CO electmoxidation spectra showed similar surface oxidation behavior.