Adsorption of thiourea on monocrystalline copper electrodes

Łukomska, Aneta; Smoliński, Sławomir; Sobkowski, Jerzy

doi:10.1016/s0013-4686(01)00602-8

Cited by 34 publications

(39 citation statements)

References 16 publications

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“…In accordance with the previous discussion, the reaction steps in the presence of TU can be assumed (in our proposal and in the literature [4,8,13,42]) as electrochemical TU oxidation and FDS formamidine disulphide dimer formation in alkaline medium and even oxidation to sulphate [42].…”

Section: Detection Resultssupporting

confidence: 87%

“…These substances are classical additives for the electrodeposition of copper and other metals [8][9][10][11][12][13][14][15][16][17][18][19][20][21][22][23], corrosion inhibitors, vulcanization accelerators, components of fertilizers, pharmaceuticals, pesticides and herbicides [2,3,5,24].…”

Section: Introductionmentioning

confidence: 99%

“…Many studies have been carried out, predominantly in acidic media [8][9][10][11][12][13][14][15][16][17][18][19][20][21][22][23], which have been concerned with the voltammetric aspects of the correlation between the electrochemical behaviour of TU and various electrode systems. The dynamic electrochemistry of the systems consisting of thiourea-electrode in an alkaline medium has been specifically studied only for Pt, Au, Ag and boron-doped diamond BDD electrodes to highlight electrode behaviour, and even for amperometric detection [3,4,5,6,7].…”

Section: Introductionmentioning

confidence: 99%

“…Isolated studies regarding the behaviour of these electrodes in alkaline and neutral media [4][5][6] have suggested the intricate interfacial aspects and ligand bonding of thiourea, and some modifications of surface structure considered as adsorption effects [20,[27][28][29]. Copper electrodes and thiourea have been explored mainly from the point of view of cathodic processes and anodic behaviour in acidic media [8][9][10][11][12][13][14][15][16][17][18][19][20][21][22][23], but not in alkaline media.…”

Section: Introductionmentioning

confidence: 99%

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Amperometric determination of thiourea in alkaline media on a copper oxide–copper electrode

2006

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A copper oxide-copper electrode was tested in alkaline media for the anodic electrochemical detection of thiourea (TU). The correlation between the history of the electrode and potential range for optimum sensing of the particular susceptible species was analysed by electrochemical and surface layer techniques. The chemical composition and morphology of surface layers were examined using the SEM/EDX technique. Electrochemical data were obtained by cyclic voltammetry (CV) and chronoamperometry (CA). The linear calibration plots for an amperometric detection of TU in a delimited potential range, using CV and CA, were obtained for the 1-8 mM concentration range. Some considerations on the correlation between TU, electrode formation and polarization conditions are proposed. A copper oxide-copper electrode can be used as an inexpensive alternative for amperometric determination of TU in alkaline media without fouling the electrode surface.

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Section: Detection Resultssupporting

confidence: 87%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Amperometric determination of thiourea in alkaline media on a copper oxide–copper electrode

2006

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“…1 the shapes of the curves, though similar, are different for each plane of the copper electrodes. The sequence of faradaic current commencement in sodium perchlorate solutions follows the order: Cu (1 1 1) > Cu (poly) > Cu (1 0 0) > Cu (1 1 0) and is the same as in perchloric acid solutions [23]. A similar sequence is observed for the onset of the electrode oxidation; the Cu (1 1 1) electrode is oxidized more easily than Cu (1 1 0).…”

Section: Resultsmentioning

confidence: 54%

Potential of zero charge of monocrystalline copper electrodes in perchlorate solutions

Łukomska

Sobkowski

2004

Journal of Electroanalytical Chemistry

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136

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Time and Potential‐Resolved Comparison of Copper Disc and Copper Nanoparticles for Electrocatalytic Hydrogenation of Furfural

et al. 2023

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Herein, a comparative analysis of two case example catalysts for electrocatalytic hydrogenation (ECH) of furfural under acidic conditions, namely a copper polycrystalline disc and copper nanoparticles dispersed on carbon support, is performed. To gain a detailed insight on ECH trends, a task‐specific methodology is employed based on electrochemistry–mass spectrometry coupling, which enabled time‐ and potential‐resolved detection of volatile ECH products, i.e., 2‐methylfurane (2‐MF) and H2. In this way, the ability to elucidate potential‐dependent product distribution for the two catalysts, namely faradaic efficiency, is achieved. Accordingly, the nanoparticulate analog is significantly more active toward competitive hydrogen evolution reaction and 2‐MF production, whereas the polycrystalline sample is more selective toward furfuryl alcohol. The observed differences in ECH are ascribed to alterations in surface domains, which is supported by surface‐sensitive lead underpotential deposition characterization.

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Adsorption of thiourea on monocrystalline copper electrodes

Cited by 34 publications

References 16 publications

Amperometric determination of thiourea in alkaline media on a copper oxide–copper electrode

Amperometric determination of thiourea in alkaline media on a copper oxide–copper electrode

Potential of zero charge of monocrystalline copper electrodes in perchlorate solutions

Time and Potential‐Resolved Comparison of Copper Disc and Copper Nanoparticles for Electrocatalytic Hydrogenation of Furfural

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