Zero Current Potentiometry for Measuring the Interface Potential at the Electrode/Solution Interface. Theoretical and Experimental Study. Issue 9 (20th August 2013)

• Record Type: Journal Article
• Authors: Wu, N. Y.; Zang, Y. B.; Gao, W.; Xu, M. T.
• Is Part Of: Electroanalysis. Volume 25:Issue 9(2013:Sep.)
• Page Start: 2175
• Page End: 2180
• Publication Date: 2013-08-20
• Subjects: Electrochemical analysis -- Periodicals; Chemistry, Analytical -- Periodicals; Electrochemistry -- Periodicals; 543.4
• DOI: 10.1002/elan.201300162
• Languages: English
• ISSNs: 1040-0397

Abstract

<abstract abstract-type="main" xml:lang="en"> <title>Abstract</title> <p>A novel electrochemical approach has been proposed to measure the interface potential at the electrode/solution interface based on reconstructing the three‐electrode system of a potentiostat. In this work, the method was investigated both theoretically and experimentally. Mathematical expressions, describing currentpotential characteristics, were derived. Zero current potential <italic>E</italic>_zcp was defined as the potential at which the current is zero based on linear sweep voltammetry, and was determined from the <italic>I</italic><italic>E</italic> curve to measure the interface potential. The experimental results obtained with the couples Fe(CN)₆³⁻/Fe(CN)₆⁴⁻ and Co(NH₃)₆³⁺/Co(NH₃)₆²⁺ as examples agreed well with the theory. The proposed approach exhibits an excellent performance for measuring the interface potential due to the advantages of rapidity, high stability and accuracy.</p> </abstract>