DIFFERENTIAL CAPACITANCE OF LIQUID/LIQUID INTERFACES - EFFECT OF ELECTROLYTES PRESENT IN EACH PHASE

• Type: Article in International Scientific Journal
• Date: 1994

Authors

PEREIRA, CM (Author) FCUP; MARTINS, A (Author) Other; ROCHA, M (Author) Other; SILVA, CJ (Author) Other; SILVA, F (Author) FCUP

Journal

Title: Journal of the Chemical Society - Faraday Transactions

Vol. 90

Pages: 143-148

ISSN: 0956-5000

Publisher: Royal Society of Chemistry

Indexing

ISI Web of Knowledge - 44 Citations

Scopus - 46 Citations

Scientific classification

FOS: Natural sciences > Chemical sciences

Other information

Authenticus ID: P-001-KGK

DOI: 10.1039/ft9949000143

Abstract (EN): The effect of electrolyte type and concentration on the differential capacitance of the 1,2-dichloroethane/water interface has been measured. The results show that the differential capacitance is controlled by the pair ion (1)-counter-ion (2), where 1 and 2 denote the different phases. At constant organic electrolyte composition the capacity increases in the order, F-<SO42-<HO-<ClO4-,Li+<H+<K+<Mg2+<Ba2+<Sr(2+)approximate to Ca2+. By contrast, at positive potentials and constant aqueous electrolyte composition, the capacitance decreases in the order, TPA(+)>MTMA(+)>TBA(+)>TOA(+),TPB->TCPB-. In very dilute solutions, the effects are not noticeable.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 6