Chronopotentometric study of Cu(I)/Pt electrode processes in molten Na2Si2O5

✍ Scribed by Bożena Strzelbicka; Aleksander Bogacz; Jerzy Kaźmierczak

• Publisher: Elsevier Science
• Year: 1985
• Tongue: English
• Weight: 524 KB
• Volume: 30
• Category: Article
• ISSN: 0013-4686
• DOI: 10.1016/0013-4686(85)80120-1

✦ Synopsis

In the present papercbronopotentiometry was employed to investigate the transport process and mechanism of the Cu(I) ion reduction in liquid Na 2 Si 1O, on platinum electrodes over the temperature range from 1283 to 1423 K . The Sand product 1 -11 r"' from the region of its constancy was a linear function of concentration and the diffusion coefficients of the Cu(l) ion in Na 2 Si,O, were 7 .88 x 10 -6 and 2 .53 x lo-'m's' for 1283 and 1423 K, respectively . The diffusion process of the Cu(I) ion in liquid Na,Si 2 0, satisfies the Arrhenius' equation .

The reduction process of the Cu(I) ion at temperatures lower than the melting point of copper was defined as a reversible electrode process with insoluble products .

The experimental curves for the same process occuring at temperatures exceeding the melting point of copper were described numerically by an equation allowing fordiffusion of copper deposited in the reversible electrode reaction into the electrode .