ELECTRODE PROCESSES WITH SPECIFIC OR NON-SPECIFIC ADSORPTION: FARADAIC IMPEDANCE AND RECTIFICATION
Abstract
Faradaic impedance and faradaic rectification are discussed for processes with specific or non-specific adsorption of reactants and/or reaction products. No explicit form of the rate equation for adsorption kinetics is postulated. Analysis of the faradaic impedance for processes with specific adsorption includes: derivation of a general current - potential characteristic for small amplitudes without the postulating of an explicit form for the rate equation for charge transfer kinetics; an equivalent circuit for electrode processes in which adsorption processes are independent of one another (e.g., as for metal deposition with amalgam formation); variations of the phase angle with frequency and analysis of some existing data in the literature; and correction for the double layer capacity. Equivalent circuits for processes with non-specific adsorption of reactants, i.e., with repulsion or attraction of the discharged species, are also derived for the faradaic impedance. Faradaic rectification is treated for the above cases, and the frequency dependence of the rectification voltage is analyzed in detail. Implications in the determination of kinetic parameters are pointed out. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Mar 01, 1961
- Accession Number
- AD0256366
Entities
People
- Mitsugi Senda
- Paul Delahay
Organizations
- Louisiana State University