The anodic dissolution of thin films of copper metal from pyrolytic graphite

Vassos, Basil H.; Mark, Harry B.

doi:10.1016/0022-0728(67)80085-8

Cited by 42 publications

(11 citation statements)

References 26 publications

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“…Therefore, this physical description of the early stages of Cu electrodeposition on Pt is coherent with the appearance of bare Pt sites in between randomly distributed 3D growth centres for Cu. This conclusion agrees with X-ray fluorescence emission data for Cu electrodeposition on graphite electrodes indicating at Ed c E, clusters of several pm and bare electrode areas between the ciusters at the early stage of the electrodeposition process [19].…”

Section: Discussionsupporting

confidence: 91%

Competition between the rearrangement of electrodeposited overlayers of copper on platinum and the hydrogen electrode reactions

Margheritis

Salvarezza

Giordano

et al. 1987

Journal of Electroanalytical Chemistry and Interfacial Electroc

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The electrodeposition of Cu'+ ions on polycrystalline Pt from acid aqueous CuSG, solutions was studied in the underpotential (upd) and overpotential (opd) ranges by using potentiostatic and potentiodynamic techniques. In the upd region, monotonic current transients were recorded for potentials (Ed) more positive than the reversible potential (E,) of the Cu'+/Cu electrode. For Cu electrodeposits involving a charge density close to that of the complete Cu monolayer, the hydrogen electrode reactions were strongly inhibited. Otherwise, non-monotonic current transients were recorded for Ed -+ E,, These transients suggest rearrangement of the monolayer structure when additional Cu atoms are deposited. In the opd region where the early stages of threodimensional(3D) nucleation and growth take place, the contribution of the hydrogen electrode reaction reappeared due to bare platinum sites which are present in the early stages of 3D growth. The present results in the limiting case can be interpreted in terms of a 2D to 3D transition at the overlayer level implying a certain distribution of clusters and the reappearance of the bare substrate surface. This process, in principle, accounts for the anomalies observed systemati~y in vohammetric measurements for this system.

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Section: Discussionsupporting

confidence: 91%

Competition between the rearrangement of electrodeposited overlayers of copper on platinum and the hydrogen electrode reactions

Margheritis

Salvarezza

Giordano

et al. 1987

Journal of Electroanalytical Chemistry and Interfacial Electroc

View full text Add to dashboard Cite

show abstract

“…It should also be noted that the peak widths at half height (W 1y2 ) are different for these two peaks, i.e., at À0.55 V, W 1y2 is 25 mV and at À0.50 V, W 1y2 is 50 mV suggesting different strengths of adsorption of Pb in the mono-and multilayers. Similar observations have been reported by Vassos and Mark [15] for stripping studies of Cu at a pyrolytic carbon electrode. Clearly the number and position of stripping peaks was dependent on both deposition potential and concentration.…”

Section: Optimization Of Asv Conditions For Trace Pb Measurements Andsupporting

confidence: 82%

Voltammetric Behavior and Trace Determination of Lead at a Mercury-Free Screen-Printed Carbon Electrode

2000

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Screen-printed carbon electrodes (SPCEs), without chemical modi®cation, have been investigated as disposable sensors for the measurement of trace levels of Pb. Cyclic voltammetry was employed to elucidate the electrochemical behavior of Pb at these electrodes in a variety of supporting electrolytes. For all of the electrolytes studied the anodic peaks obtained on the reverse scans, showed that the Pb had been deposited as a thin layer on the surface of the SPCE. The anodic peak of greatest magnitude was obtained in 0.1 M HCl. The possibility of determining Pb at trace levels using this medium was examined by anodic stripping voltammetry using the differential pulse waveform in the measurement step. Models are suggested for the deposition of Pb onto the SPCE surface under stated conditions. Calibration plots were found to be linear in the range 6.3 ngmL 71 to 24 ngmL 71 and 24 to 50 ngmL 71; the detection limit was 2.5 ngmL 71 and the coef®cient of variation, determined on one single electrode, at a concentration of 12.6 ngmL 71 was calculated to be 2.4 % (n 5). The effect of copper, cadmium and zinc on the Pb stripping peak was examined and, under the conditions employed, no signi®cant change in current was found. The sensors were evaluated by carrying out Pb determinations on spiked and unspiked pond water. The recovery was calculated to be 97.4 % and the coef®cient of variation was 3.2% at a concentration of 12.6 ngmL 71. These performance characteristics indicate that reliable data may be obtained for Pb measurements in natural waters.

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“…This fact is in a good agreement with the literature [3, p. 145], i.e., the UPD effect on graphite is weak (in comparison with composite or metal electrodes) and less reproducible [24,25,26,27]. On the other hand, our results showed a UPD effect on composite electrodes consisting only of graphite powder and methacrylate resin -these results will be published later.…”

Section: Resultssupporting

confidence: 94%

Voltammetry of lead cations on a new type of silver composite electrode in the presence of other cations

2004

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A new type of silver composite electrode was examined, prepared from silver, graphite powder, and methacrylate resin. The effects of the presence of various cations (cadmium, copper, bismuth, thallium), anions (chlorides), surface-active substances (Triton X-100), and oxygen on the anodic-stripping voltammetric determination of lead were studied. It was found that the effect of underpotential deposition at the composite electrode differs from that produced at a metallic silver electrode, mainly at low concentrations of the deposited metal. The use of this type of silver composite electrode in differential pulse anodic-stripping voltammetry enables direct determination of lead in natural water samples without elimination of surface-active substances (LOD about 3 microg L(-1)).

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The anodic dissolution of thin films of copper metal from pyrolytic graphite

Cited by 42 publications

References 26 publications

Competition between the rearrangement of electrodeposited overlayers of copper on platinum and the hydrogen electrode reactions

Competition between the rearrangement of electrodeposited overlayers of copper on platinum and the hydrogen electrode reactions

Voltammetric Behavior and Trace Determination of Lead at a Mercury-Free Screen-Printed Carbon Electrode

Voltammetry of lead cations on a new type of silver composite electrode in the presence of other cations

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