Thermodynamics and kinetics of upd of lead on polycrystalline silver and gold

Kirowa‐Eisner, E.; Bonfil, Y.; Tzur, Dora; Gileadi, E.

doi:10.1016/s0022-0728(03)00181-5

Cited by 87 publications

(82 citation statements)

References 22 publications

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“…A mass loss (frequency increase) was also observed during the stripping of the underpotential deposit. The UPD stripping peak exhibited a shoulder, correlating with the results of other research groups that observed two pairs of peaks for the UPD-SV processes on polycrystalline gold electrodes [13,16].…”

Section: General Observationssupporting

confidence: 88%

Underpotential Deposition and Stripping of Lead at Disorganized Monolayer‐Modified Gold Electrodes

Herzog

Arrigan

2005

Electroanalysis

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Underpotential deposition (UPD) and stripping of Pb 2þ at thiol-based disorganized monolayer-modified gold electrodes was studied by cyclic voltammetry (CV) and electrochemical quartz crystal microgravimetry (EQCM). Electrodes modified with mercaptoacetic acid or mercaptoethane sulfonic acid were studied. Due to the proximity of the potentials for the Pb UPD and thiol reductive desorption, achievement of a UPD-stripping voltammetry methodology for determination of low concentrations of Pb 2þ was not successful. However by comparison of the CV and EQCM data and consideration of the possible mass changes per mole electrons transferred in light of the other species present in solution, possible mechanisms are put forward for the deposition and stripping of Pb 2þ at thiolmodified electrodes.

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Section: General Observationssupporting

confidence: 88%

Underpotential Deposition and Stripping of Lead at Disorganized Monolayer‐Modified Gold Electrodes

Herzog

Arrigan

2005

Electroanalysis

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“…The result of the attack by Fentons reagent was probed by measuring CVs in 0.1m H 2 SO 4 or upd of Pb on Au. [19] AFM images were recorded with a "NanoScope I" (Digital Instruments) using the software "NanoScope E 4.23r3". To minimize the catalytic decomposition of H 2 O 2 at the gold surface and at the cantilever during AFM imaging, the OHC radicals were generated electrochemically.…”

Section: Methodsmentioning

confidence: 99%

Hydroxyl Radicals Attack Metallic Gold

et al. 2010

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“…Sharp voltammetric peaks occur when these lateral interactions are attractive in nature (f < 0). 66,67 For sufficiently strong lateral interactions, voltammetric sweeps may induce a rapid phase transformation at the surface. 63,67 In general, electron transfer involving more than a monolayer or occurring on multiple crystal faces does not give rise to a single sharp peak.…”

Section: Metal Oxidesmentioning

confidence: 99%

“…66,67 For sufficiently strong lateral interactions, voltammetric sweeps may induce a rapid phase transformation at the surface. 63,67 In general, electron transfer involving more than a monolayer or occurring on multiple crystal faces does not give rise to a single sharp peak. Moreover, such sharp peaks generally correspond to a quick transition from very low (θ ≈ 0) to very high (θ ≈ 1) surface coverage, rather than electron transfer involving only part of the surface layer.…”

Section: Metal Oxidesmentioning

confidence: 99%

An Oxalate Method for Measuring the Surface Area of Nickel Electrodes

Hall

Bock

MacDougall

2014

J. Electrochem. Soc.

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This work establishes a new method to measure the electrochemically active surface area (A ECSA ) of nickel electrodes, in situ. The addition of 0.08 mol L −1 of an oxalate salt to an alkaline electrolyte solution shifts the half-wave potential of the Ni(II)/Ni(III) redox pair by about −80 mV. Further, these peaks are very narrow. The sharpest peak in this work has a full width at half maximum (FWHM) of just 11 mV. This unusual sharpness is attributed to the layered structure of nickel hydroxides and the adsorption of oxalate from the solution on the (001) surface. This is supported by attenuated total reflectance infrared (ATR-IR) peaks measured at 1265 cm −1 , 1655 cm −1 , and 1713 cm −1 , which correspond to mononuclear bidentate oxalate bonded to nickel. At sufficiently fast potential scan rates (≥150 mV s −1 ), the adsorbed oxalate limits growth of the surface hydroxide to a single layer. During the reverse scan, the surface NiOOH/Ni(OH) 2 reduction peak is well-separated from other electrochemical processes and may be used to accurately and precisely measure the A ECSA . The error of this method is estimated at < 10%.

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Thermodynamics and kinetics of upd of lead on polycrystalline silver and gold

Cited by 87 publications

References 22 publications

Underpotential Deposition and Stripping of Lead at Disorganized Monolayer‐Modified Gold Electrodes

Underpotential Deposition and Stripping of Lead at Disorganized Monolayer‐Modified Gold Electrodes

Hydroxyl Radicals Attack Metallic Gold

An Oxalate Method for Measuring the Surface Area of Nickel Electrodes

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