The deposition and stripping of mercury on glassy carbon in 0.1 molar acid

Authors

  • Cherrie B. Pascual Institute of Chemistry, University of the Philippines, Diliman, Quezon City
  • Victoria A. Vicente-Beckett Institute of Chemistry, University of the Philippines, Diliman, Quezon City

DOI:

https://doi.org/10.26534/kimika.v12i1.29-35

Keywords:

mercury, glassy carbon, deposition and dissolution processes, anodic stripping voltammetry

Abstract

The electrochemical behavior of mercury on the glassy carbori electrode (GCE) was studied using anodic stripping voltammetry. The mercury deposition and dissolution processes on glassy carbon apparently consist of two major stages. Firstly, a two-electron reduction of Hg(II) occurs, with two monolayers of Hg(0) depositing on· the electrode surface and giving rise to a stripping peak at about +0.30 V vs. SCE during the anodic scan. The charge corresponding to this first monolayer of Hg(0) on GCE was determined to be approximately 430 microcoulombs per cm2 (geometric area) of the electrode. Secondly, bulk mercury(0) deposition occurs at higher Hg(II) concentration or longer deposition times than required for Hg(0) monolayer formation. This gives rise to a second stripping peak at +0.45V.

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How to Cite

Pascual, C. B., & Vicente-Beckett, V. A. (1996). The deposition and stripping of mercury on glassy carbon in 0.1 molar acid. KIMIKA, 12(1), 29–35. https://doi.org/10.26534/kimika.v12i1.29-35

Issue

Vol. 12 (1996)

Section

Research Articles

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