Catalogo Articoli (Spogli Riviste)

OPAC HELP

Titolo:
Study of kinetics of charge transfer across a supported liquid membrane under transient conditions
Autore:
Barker, MH; Murtomaki, L; Kontturi, K;
Indirizzi:
Helsinki Univ Technol, Phys Chem & Electrochem Lab, FIN-02015 HUT, FinlandHelsinki Univ Technol HUT Finland FIN-02015 Lab, FIN-02015 HUT, Finland
Titolo Testata:
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
fascicolo: 1-2, volume: 497, anno: 2001,
pagine: 61 - 68
Fonte:
ISI
Lingua:
ENG
Soggetto:
OCTYL ETHER INTERFACE; ION TRANSFER; POLARIZATION PHENOMENA; ELECTROLYTES; VOLTAMMETRY;
Keywords:
ion transfer kinetics; liquid/liquid interface; orthogonal collocation; supported liquid membrane;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Citazioni:
11
Recensione:
Indirizzi per estratti:
Indirizzo: Murtomaki, L Helsinki Univ Technol, Phys Chem & Electrochem Lab, POB 6100,FIN-02015 HUT, Finland Helsinki Univ Technol POB 6100 HUT Finland FIN-02015 Finland
Citazione:
M.H. Barker et al., "Study of kinetics of charge transfer across a supported liquid membrane under transient conditions", J ELEC CHEM, 497(1-2), 2001, pp. 61-68

Abstract

The transfer of a cation across a supported liquid membrane is studied both theoretically and experimentally during a linear potential scan. The transferring cation was originally present both in the membrane and in the flanking aqueous phases, thus working as a potential-determining ion in the system. With this set-up, the transfer kinetics of hydrophobic ions which usually determine the limits of the potential window of an ideally polarised liquid / liquid interface can be studied, even if the standard potential of transfer is unknown. The probe cation studied was tetrabutylammonium, and the membrane phase was o-nitrophenyloctyl ether. The observed standard rate constant k(0) took a surprisingly low Value of ca. 2 x 10(-4) cm s(-1); however, this agrees with the Values measured with a rotating diffusion cell under steady-state conditions. It is therefore suggested that the different values obtained with different techniques reflect the structural changes of the liquid / liquid interface due to the electric current. (C) 2001 Elsevier Science B.V. All rights reserved.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 27/11/20 alle ore 02:04:49