Electrochemical faceting of polycrystalline gold in 1 M H2SO4

Perdriel, C.L.; Arvía, Alejandro Jorge; Ipohorski, M.

doi:10.1016/0022-0728(86)87025-5

Cited by 56 publications

(38 citation statements)

References 36 publications

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“…Instead of using toner [29], the geometric area (0.071 cm 2 ) was defined using galvanoplasty tape (Type 470, 3 M, SumarØ, Brazil), and the electrical contact was made with a copper wire [30]. Cyclic voltammetry measurements were performed in 0.5 mol L À1 H 2 SO 4 to clean the gold surface [31].…”

Section: Construction Of the Cdtrodes And Formation Of The Lipoic Acimentioning

confidence: 99%

Application of Factorial Design Experiments to the Development of a Disposable Amperometric DNA Biosensor

2011

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The development of an amperometric DNA-based biosensor (genosensor) requires the optimization of many experimental parameters in order to maximize sensitivity. If only one parameter is evaluated per experiment, the resultant genosensor is unlikely to be ideal, because several of the parameters could be interdependent. Herein, chemometric experiments employing full and fractional factorial designs were used to develop biosensor for hepatitis. The results demonstrate that the use of chemometric tools enables optimization of experimental conditions using a smaller number of experiments and with reduced requirements for reagents and samples, which is in line with the principles of green chemistry.

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Section: Construction Of the Cdtrodes And Formation Of The Lipoic Acimentioning

confidence: 99%

Application of Factorial Design Experiments to the Development of a Disposable Amperometric DNA Biosensor

2011

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“…An intermediate state between single crystals and polycrystals are the preferentially oriented electrodes, which consisted of grains, as poly-crystals, but the surface grains are preferentially oriented according to a single plane. Techniques have been developed to obtain preferentially oriented surfaces [6]. In this way, a first attempt of applying the results obtained with single crystals to poly-crystals has been recently done [3].…”

Section: Introductionmentioning

confidence: 99%

Hydrogen oxidation on gold electrode in sulphuric acid solution

Sustersic

Almeida

Mengershausen

et al. 2012

International Journal of Hydrogen Energy

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Electrode Sulphuric acid Hydrogen Oxidation a b s t r a c t The aim of this work is to study the electrochemical oxidation of Hydrogen on gold electrodes in sulphuric acid solution and to compare the results with those obtained in a similar study in perchloric acid solution. In both electrolytes, the reaction is irreversible because the atomic H, which appears as reaction intermediate, diffuses inside of the metal. The reactive is introduced in two ways: by electrolysis at a cathodic potential during different times and by saturating the solution with the gaseous reactive. During the cathodic electrolysis the different crystalline planes of the surface reconstruct and this feature has an influence on the reaction kinetics. The catalytic influence of the incipient hydrous gold oxide on the H electrooxidation is also shown. The presence of sulphate and perchlorate ions leads to unlike voltamperometric profiles in the double layer charging potential region. A gold compound is formed during the metal treatment and an attempt has been done to identify it with FTIR.

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“…It is widely accepted in the literature that the oxidation of gold is a complex process that proceeds via anion replacement, adsorption and place‐exchange of oxygen species and the formation of a so called “monolayer oxide”, and results in a multiplicity of anodic peaks . There are several approaches to identify these peaks, e. g., intermediate steps in the formation of a gold oxide layer, stepwise coordination and formation of several monolayers of adsorbed OH − ‐species as well as influence and amount of specific low index crystal planes ,. A dependence of the oxidation signal on the quantity of various defect structures on the electrode surface, has been reported for monocrystalline gold electrodes .…”

Section: Introductionmentioning

confidence: 99%

Electrochemical Formation of Gold Nanoparticles on Polycrystalline Gold Electrodes during Prolonged Potential Cycling

et al. 2017

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The voltammetric behavior of polycrystalline gold electrodes in 0.1 M sulfuric acid and the influence of prolonged repetitions of oxidation and reduction cycles at different scan rates on the surface morphology was studied. Slow (0.1 V s−1) as well as fast (1.0 V s−1) scan rates lead to an intense roughening of the electrode surface and the formation of a variety of different crystalline particles on it. These crystallites, their formation, and the influence of surface pretreatment were investigated with electrochemical methods, X‐ray diffraction measurements, and scanning electron microscopy. Additionally, an interpretation of the changing electrochemical signals of polycrystalline gold during prolonged potential cycling is given.

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Electrochemical faceting of polycrystalline gold in 1 M H2SO4

Cited by 56 publications

References 36 publications

Application of Factorial Design Experiments to the Development of a Disposable Amperometric DNA Biosensor

Application of Factorial Design Experiments to the Development of a Disposable Amperometric DNA Biosensor

Hydrogen oxidation on gold electrode in sulphuric acid solution

Electrochemical Formation of Gold Nanoparticles on Polycrystalline Gold Electrodes during Prolonged Potential Cycling

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