Correlation between electrode surface coverage and the rate of inhibition of Pb(II) reduction process at the DME in HClO4 solutions
✍ Scribed by M.M. Abou-Romia; A.A. Mazhar; A.M. Bekheet
- Publisher
- Elsevier Science
- Year
- 1983
- Tongue
- English
- Weight
- 430 KB
- Volume
- 28
- Category
- Article
- ISSN
- 0013-4686
No coin nor oath required. For personal study only.
✦ Synopsis
This study was conducted lo ascertain that the main factor governing the inhibition of the Pb(II) reduction process in 1 N HCIO, solutions was the extent of electrode surface coverage by coumarin molecules. The electrode surface coverage was calculated from the results of electrorapillary and differential capacitance measurements. These results indicated the applicability of the Flory-Hug&s equation in case of adsorption ofcoumarin in 1 N HCIO, solution at the dropping mercury electrode. The rate constants for the Pb(II) reduction process in the same solutions were calculated from results of electrode impedance measurements. The direct relation between surface coverage and the decreasing rate constants is in agreement with the postulate of their interdependence.