Underpotential deposition and electrocatalysis

Kokkinidis, G.

doi:10.1016/0022-0728(86)80051-1

Cited by 187 publications

(64 citation statements)

References 121 publications

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“…The data reported so far are in accord with this statement (cf. references [1] and [2]), thus confirming a small role that the nature of the metal electrode has these reactions. In a recent work, Nagy et al [11] took special care to remove traces of chlorides that can be coadsorbed with metal adatoms and tha can increase the concentration of cations in the double layer.…”

Section: +mentioning

confidence: 58%

“…A considerable increase in reversibility caused by metal adlayers has been attributed by Kokkinidis [17] to the change of the reaction mechanism, from an "inner-sphere" mechanism on a Pt surface with adsorbed intermediates, to an "outer sphere" reaction on Pt/M ad surfaces without adsorbed intermediates. Fonseca et al [16] well as on some other platinum metals (see reviews of previous work in references [1,2].…”

Section: +mentioning

confidence: 99%

“…Iwasita et al [15] In contrast to the simple redox reactions, the rates of the redox processes involving organic couples are considerably increased by metal adlayers on electrode surfaces. Some examples include quinhydrone, pyrocatachol/o-benzoquionone, adrenaline/adrenalinquinone, and other quinone-type redox couples [2]. Fig.…”

Section: +mentioning

confidence: 99%

“…Inhibition is also often observed, in particular for H 2 evolution and hydration of hydride-forming metals by the adlayers of metals with high hydrogen evolution overpotentials. Two reviews exist on the work prior to 1984 [1] and 1985 [2].…”

Section: Introductionmentioning

confidence: 99%

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Electrocatalysis on Surfaces Modified by Metal Monolayers Deposited at Underpotentials

Adžić

2002

Encyclopedia of Electrochemistry

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The sections in this article are Introduction Structural and Electronic Properties of Electrode Surfaces with Metal Adlayers Electrocatalysis on Surfaces Modified with Metal Adlayers Redox Reactions Oxidation of Organic Molecules Formic Acid Methanol Carbon Monoxide Other Organic Molecules Electroorganic Synthesis Hydrogen Evolution Oxygen Reduction Alkaline Solutions Acid Solutions Hydrogen Peroxide Reduction Mechanisms of Catalytic Effects Electrodeposition of Metals Acknowledgment

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Section: +mentioning

confidence: 58%

Section: +mentioning

confidence: 99%

Section: +mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Electrocatalysis on Surfaces Modified by Metal Monolayers Deposited at Underpotentials

Adžić

2002

Encyclopedia of Electrochemistry

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“…In this deposition process, the sub-layer of the selected metallic deposition was known to be extremely sensitive to the surface structure of the electrode, enhancing the sensitivity of electrode per se [22][23][24]. Our previous investigation of under-potential deposited metallic films in sub-layer thickness demonstrated the enhancement of the sensitivity of the sensor itself also, such as cadmium and thallium sub-layers for the detection of carbon dioxide and glucose, respectively [25,26].…”

Section: Under-potential Deposition Of Bismuth On the Thin Gold Film mentioning

confidence: 99%

A Simple, Cost-Effective Sensor for Detecting Lead Ions in Water Using Under-Potential Deposited Bismuth Sub-Layer with Differential Pulse Voltammetry (DPV)

Dai

Liu

2017

Preprint

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Abstract:The accumulation of high levels of lead or lead ions in a human body is harmful, particularly to children. Its neurotoxic effect is profound, damaging the central and peripheral nervous systems, resulting in stunted growth, behavioral problems and learning disabilities. The major source of lead or lead ions comes from the drinking water and tap water. The assessment of the water quality, including lead or lead ion content, is usually completed by a regional water department professional. This assessment is time-consuming and requires expensive instruments and skilled operators.Therefore, there is a need to produce a simple-use and relatively inexpensive method to detect lead or lead ions in water samples. This research has developed a simple-use, cost effective sensor system for the detection of lead ions in tap water. An underpotential deposited bismuth sub-layer on a thin gold film based electrochemical sensor was designed, manufactured and evaluated.Differential pulse voltammetry (DPV) measurement technique was employed in this detection. Tap water from the Cleveland, Ohio, USA regional water district was the test medium. Concentrations of lead ion in the range of 8 X 10 -8 M to 8 x 10 -4 M were evaluated.This DPV detection system required 3 -6 minutes to complete the detection measurement. A longer measurement time of 6 minutes was used for the lower lead ion concentration. The selectivity of this lead ion sensor was very good, and Fe III, Cu II, Ni II and Mg II at a concentration level of 5×10 -4 M did not interfere with the lead ion measurement.

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