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Interaction between co-deposited metals during stripping voltammetry at boron-doped diamond electrodes.
Phys Chem Chem Phys. 2005 Jul 21; 7(14):2787-92.PC

Abstract

Electrochemical processes, which underlie the use of conductive diamond electrodes for the simultaneous detection of two or more metal ions in solution by anodic stripping voltammetry (ASV), have been investigated. The model analyte system studied contains the two metal species, Ag+(aq) and Pb2+(aq), and the experimental techniques employed include cyclic and square wave voltammetries, along with X-ray photoelectron spectroscopy and secondary electron microscopy. Although the bulk metallic forms of Ag and Pb are immiscible, several interactions in the system between the two metal species present are observed, which significantly influence the electrodeposition and electrodissolution processes which underlie ASV. The subsequent nucleation and growth of a given metal on the electrode surface is enhanced by the presence of the second metal on the surface. The encapsulation of one metal by the other, within the metal particulates that form on the electrode surface, significantly reduces the stripping yield at the potentials characteristic of the individual metals. The stripping potentials are also influenced by bonding interactions between deposited Ag and Pb, which broaden the characteristic stripping peaks in cyclic voltammetry, as well as producing underpotential deposition and stripping. Given these interactions, the extent to which ASV at diamond electrodes can be used to determine the solution concentrations of Ag+(aq) and Pb2+(aq) is considered.

Authors+Show Affiliations

Department of Chemistry, University of Oxford, Chemistry Research Laboratory, Mansfield Road, Oxford, UK. john.foord@chem.ox.ac.ukNo affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Journal Article

Language

eng

PubMed ID

16189594

Citation

Foord, John S., et al. "Interaction Between Co-deposited Metals During Stripping Voltammetry at Boron-doped Diamond Electrodes." Physical Chemistry Chemical Physics : PCCP, vol. 7, no. 14, 2005, pp. 2787-92.
Foord JS, Eaton K, Hao W, et al. Interaction between co-deposited metals during stripping voltammetry at boron-doped diamond electrodes. Phys Chem Chem Phys. 2005;7(14):2787-92.
Foord, J. S., Eaton, K., Hao, W., & Crossley, A. (2005). Interaction between co-deposited metals during stripping voltammetry at boron-doped diamond electrodes. Physical Chemistry Chemical Physics : PCCP, 7(14), 2787-92.
Foord JS, et al. Interaction Between Co-deposited Metals During Stripping Voltammetry at Boron-doped Diamond Electrodes. Phys Chem Chem Phys. 2005 Jul 21;7(14):2787-92. PubMed PMID: 16189594.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Interaction between co-deposited metals during stripping voltammetry at boron-doped diamond electrodes. AU - Foord,John S, AU - Eaton,Kirk, AU - Hao,Wang, AU - Crossley,Alison, Y1 - 2005/06/16/ PY - 2005/9/29/pubmed PY - 2005/12/16/medline PY - 2005/9/29/entrez SP - 2787 EP - 92 JF - Physical chemistry chemical physics : PCCP JO - Phys Chem Chem Phys VL - 7 IS - 14 N2 - Electrochemical processes, which underlie the use of conductive diamond electrodes for the simultaneous detection of two or more metal ions in solution by anodic stripping voltammetry (ASV), have been investigated. The model analyte system studied contains the two metal species, Ag+(aq) and Pb2+(aq), and the experimental techniques employed include cyclic and square wave voltammetries, along with X-ray photoelectron spectroscopy and secondary electron microscopy. Although the bulk metallic forms of Ag and Pb are immiscible, several interactions in the system between the two metal species present are observed, which significantly influence the electrodeposition and electrodissolution processes which underlie ASV. The subsequent nucleation and growth of a given metal on the electrode surface is enhanced by the presence of the second metal on the surface. The encapsulation of one metal by the other, within the metal particulates that form on the electrode surface, significantly reduces the stripping yield at the potentials characteristic of the individual metals. The stripping potentials are also influenced by bonding interactions between deposited Ag and Pb, which broaden the characteristic stripping peaks in cyclic voltammetry, as well as producing underpotential deposition and stripping. Given these interactions, the extent to which ASV at diamond electrodes can be used to determine the solution concentrations of Ag+(aq) and Pb2+(aq) is considered. SN - 1463-9076 UR - https://www.unboundmedicine.com/medline/citation/16189594/Interaction_between_co_deposited_metals_during_stripping_voltammetry_at_boron_doped_diamond_electrodes_ L2 - https://doi.org/10.1039/b506311f DB - PRIME DP - Unbound Medicine ER -