Electroanalysis with electrodes modified by inorganic films

Cox, James A.; Jaworski, R.; Kulesza, Paweł J.

doi:10.1002/elan.1140030902

Cited by 123 publications

(58 citation statements)

References 123 publications

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“…Metal oxide modified electrodes for the catalysis of redox processes have drawn considerable attention of electroanalytical chemists (e.g., [ 51]>, yet only a few applications in flowing solutions have been described [33,35,52]. Following the work of Xie and Huber [52], who developed cabon paste electrodes bulk modified with cuprous oxide, we have modified the CCC matrix with Cu,O for the determination of carbohydrates.…”

Section: Oxidation Of Glucose On Cuo Modified CCCmentioning

confidence: 99%

Electrochemical characteristics of conductive carbon cement as matrix for chemically modified electrodes

Huang

Pot

Kok

1995

Analytica Chimica Acta

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Electrochemical characteristics of conductive carbon cement as matrix for chemically modified electrodes Huang, X.; Pot, J.J.; Kok, W.T. General rightsIt is not permitted to download or to forward/distribute the text or part of it without the consent of the author(s) and/or copyright holder(s), other than for strictly personal, individual use, unless the work is under an open content license (like Creative Commons). Disclaimer/Complaints regulationsIf you believe that digital publication of certain material infringes any of your rights or (privacy) interests, please let the Library know, stating your reasons. In case of a legitimate complaint, the Library will make the material inaccessible and/or remove it from the website. Please Ask the Library: http://uba.uva.nl/en/contact, or a letter to: Library of the University of Amsterdam, Secretariat, Singel 425, 1012 WP Amsterdam, The Netherlands. You will be contacted as soon as possible. AbstractConductive carbon cement (CCC) was evaluated as matrix material for the preparation of electrodes bulk-modified with electrocatalysts. For pure CCC electrodes the background current characteristics were examined. In acidic or neutral phosphate buffers the useful electrode potential range was from -0.3 to + 1.0 V vs. SCE, while in 0.1 mol l-' NaOH it was from -0.3 to + 0.7 V. The electrochemical reversibility of CCC electrodes was examined by measuring the standard rate constants for the reduction of hexacyanoferrate( III) and the oxidation of hydroquinone, using cyclic voltammetry (CV) and rotating disk experiments. The reversibility of a CCC electrode was comparable with that of a freshly polished glassy carbon electrode and better than that of carbon paste electrodes. CCC was used as matrix for the preparation of electrodes bulk-modified with cuprous oxide and cobalt phthalocyanine (CoPC). With a C&O-CCC electrode the oxidation potential of glucose, which shows sluggish kinetics at unmodified carbon electrodes, was strongly reduced. The kinetics of the mediated glucose oxidation has been studied with a rotating disk electrode. It was shown that at glucose concentrations higher than approximately 1 mmol 1-l the electrochemical regeneration of the catalyst becomes rate-determining. The Cu@-CCC modified electrode has been applied with a constant potential in flow-injection analysis for the determination of glucose. The long-term stability of the electrode was studied; repeated injections of a glucose solution during a period of 6 h yielded a relative standard deviation of the peak height of 1.8% (n = 57). In CV experiments the electrocatalytic activity of CoPC was shown for the oxidation of various compounds such as penicillamine, hydrazine and bile acids. Application of the CoPC-CCC electrode for the detection of bile acids in flow-through detection with a constant or pulsed potential failed, due to a rapid deactivation of the electrode.

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Section: Oxidation Of Glucose On Cuo Modified CCCmentioning

confidence: 99%

Electrochemical characteristics of conductive carbon cement as matrix for chemically modified electrodes

Huang

Pot

Kok

1995

Analytica Chimica Acta

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“…In order to achieve electrode with high sensitivity and long-term stability and to develop a simple method for preparing a modified electrode, sol-gel technique has been developed. [9][10][11][12][13][14][15][16] Now, the sol-gel process conducted in the presence of graphite powder was proposed for the fabrication of carbon ceramic electrodes (CCEs) as a new kind of carbon substrates in electrochemical systems. Considering the stability, permeability, simplicity, versatility, physical rigidity, transparency, porosity, efficient encapsulation, and flexibility in the fabrication procedure of carbon-ceramic substrate, it is one of the best materials that can be used as catalyst supporter.…”

Section: Introductionmentioning

confidence: 99%

Electrocatalytic oxidation of hydrazine by copper iodide modified sol-gel derived carbon-ceramic composite Electrode

Karim‐Nezhad¹,

Alipour²

2014

10.5267/j.ccl

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A new sol-gel derived ceramic-carbon composite electrode was fabricated by the use of CuI as modifier. The electrocatalytic activity of the copper iodide modified sol-gel derived ceramiccarbon composite (CIM-SGD-CCC) electrode was examined for the oxidation of hydrazine. Cyclic voltammetry was employed to study the electrochemical and electrocatalytic properties of the modified electrode. Results showed that the CIM-SGD-CCC electrode has very high catalytic activity for electrooxidation of hydrazine. This proves that the copper iodide bears the main role in electro-catalytic oxidation of hydrazine. This modified electrode shows fast amperometric response with the range from 1 μ mol L -1 to 40 μ mol L -1 and the limit of detection (LOD) of 0.524 μ mol L -1 for hydrazine. The relative standard deviation (R.S.D.) was 0.72 % for 5 successive assays. High stability, good reproducibility, rapid response, easy surface regeneration and fabrication are the important characteristics of the proposed electrode.

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“…2,3 PB and numerous other metal hexacyanometallates, 4,5 can be deposited onto inert electrode substrates to give redoxactive films 6 that have electrochromic, 5,7 electrocatalytic 5,8,9 and electroanalytical applications. 10,11,12 PB films exhibit four-colour polyelectrochromicity. 13,14 Electrochemical reduction of PB produces Prussian white (iron(II) hexacyanoferrate(II), PW), which appears transparent as a thin film.…”

Section: Introductionmentioning

confidence: 99%

In situ colorimetric and composite coloration efficiency measurements for electrochromic Prussian blue

2005

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An in situ colorimetric method, based on the CIE (Commission Internationale de l'Eclairage) system of colorimetry, has been successfully applied to the study of electrochromism in electrochemically deposited films of Prussian blue (iron(III) hexacyanoferrate(II), PB) on transmissive ITO/glass substrates for the first time. On electrochemical reduction of PB to Prussian white (iron(II) hexacyanoferrate(II), PW), sharp and reversible changes in the hue and saturation occur, as shown by the track of the CIE 1931 xy chromaticity coordinates. For PB, the CIELAB 1976 colour space coordinates were L* 5 73, a* 5 226 and b* 5 233, with a dominant wavelength calculated as 488 nm. Concurrently, as the intensely absorbing PB mixed-valence chromophore is 'bleached' to the transparent PW, a large increase in the relative luminance of the electrochromic film is observed. On oxidation of PB, the CIELAB 1976 colour space coordinates show the transition through intermediate green to the Prussian yellow (iron(III) hexacyanoferrate(III), PY) state (L* 5 94, a* 5 2 and b* 5 18), with a steady increase in relative luminance. To reliably compare the power requirement of PB films with other electrochromic systems, composite coloration efficiencies (CCE's) have been calculated, using a tandem chronoabsorptometry/chronocoulometry method, as previously developed for organic polymer systems. Using 95% of the total transmittance change at l max as reference point, coloration efficiencies, g 5 DA(l max )/Q, were calculated as 143 and 150 cm 2 C 21 respectively for the PB/PW and PW/PB electrochromic transitions.

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Electroanalysis with electrodes modified by inorganic films

Cited by 123 publications

References 123 publications

Electrochemical characteristics of conductive carbon cement as matrix for chemically modified electrodes

Electrochemical characteristics of conductive carbon cement as matrix for chemically modified electrodes

Electrocatalytic oxidation of hydrazine by copper iodide modified sol-gel derived carbon-ceramic composite Electrode

In situ colorimetric and composite coloration efficiency measurements for electrochromic Prussian blue

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