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Influence of Pb(II) Concentration and pH of Acetate Buffer on the Potential Window of a Lead Film Electrode: An Atomic Force Microscopy Study

Published online by Cambridge University Press:  26 March 2012

Katarzyna Tyszczuk-Rotko
Katarzyna Tyszczuk-Rotko*
Affiliation:
Faculty of Chemistry, Maria Curie-Sklodowska University, 20-031 Lublin, Poland
*
Corresponding author. E-mail: ktyszczuk@poczta.umcs.lublin.pl
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Abstract

Atomic force microscopy (AFM) studies on observations of lead films deposited from the solutions containing an acetate buffer and different concentration of Pb(II) are presented. AFM images show considerable variability in morphology of the deposited lead layer depending on experimental conditions. To investigate effects of the Pb(II) concentration and pH of the supporting electrolyte on the accessible potential window of the lead film electrode (PbFE), voltammetric techniques were used. It was found that the useful potential window of PbFE is affected by the pH and Pb(II) concentration. Additionally, it was found that the distribution and large size of Pb particles on the electrode surface shown by AFM corresponded well to the mass of Pb expected on the glassy carbon support with respect to the voltammetric data. Results reveal that PbFE is an attractive nonmercury metallic electrode suitable for electrochemical detection of metal ions and a lot of organic compounds in a wide potential window. The accessible potential window of the PbFE in an acetate buffer (pH = 5.0) was compared to those obtained at the bismuth film electrode and antimony film electrode.

Keywords

lead film electrodestripping analysisatomic force microscopyplating regime
Type
Materials Applications
Information
Microscopy and Microanalysis , Volume 18 , Issue 3 , June 2012 , pp. 531 - 537
Copyright
Copyright © Microscopy Society of America 2012

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