Glassy carbon electrodes

Dekanski, Aleksandar; Stevanović, Jasna; Stevanović, R.M.; Nikolić, Biljana; Jovanović, Vladan

doi:10.1016/s0008-6223(00)00228-1

Cited by 287 publications

(150 citation statements)

References 27 publications

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“…The as-grown PyC films exhibit an asymmetric peak centred at 284.7 eV, with a long tail extended to the higher-energy region. Such a peak is characteristic of aromatic structures with delocalised π electrons [28,29]. The etched films also give rise to this signal, but here the tail shows evidence of oxygen-related functionalities.…”

Section: Oxygenated Functionalities On Etched Pyc Electrodesmentioning

confidence: 95%

Thin film pyrolytic carbon electrodes: A new class of carbon electrode for electroanalytical sensing applications

Keeley

McEvoy

Kumar

et al. 2010

Electrochemistry Communications

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This communication describes the electrochemical properties of thin pyrolytic carbon (PyC) films created using a reliable, non-catalytic chemical vapour deposition (CVD) process. After deposition, the electron transfer characteristics of the films are optimised using a simple oxygen plasma treatment. The redox probes Fe + + are employed to demonstrate that the resulting material is endowed with a large electrochemical surface area and outstanding electron transfer properties. Atomic force microscopy (AFM), Raman and X-ray photoelectron spectroscopy (XPS) are used to elucidate the morphology and chemical composition of the electrode surfaces. This material represents a new class of carbon electrode, and its large densities of edge-plane sites and oxygenated functionalities make it an ideal candidate for electrochemical sensor applications.

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Section: Oxygenated Functionalities On Etched Pyc Electrodesmentioning

confidence: 95%

Thin film pyrolytic carbon electrodes: A new class of carbon electrode for electroanalytical sensing applications

Keeley

McEvoy

Kumar

et al. 2010

Electrochemistry Communications

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“…Therefore, pretreatments leading to an increase of these sites without great morphological changes on the electrode surface are denominated activation processes [18,19]. Among several procedures for activation of carbon electrodes, in particular, glassy carbon, electrochemical pretreatment in aqueous medium has been extensively investigated not only because its simplicity but also leads to an increase of active sites concentration on the electrode surface promoting the immobilization of electroactive species as well as greatly raise the heterogeneous electron transfer rate for several redox systems [18 -20].…”

mentioning

confidence: 99%

Determination of Caffeic Acid in Red Wine by Voltammetric Method

Silva

Stradiotto

Oliveira³

2008

Electroanalysis

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The electrochemical oxidation of 3,4-dihydroxycinnamic acid, caffeic acid, leads to a stable electroactive poly(caffeic acid) thin film containing quinone moiety on a preactivated glassy polymeric carbon electrode. The properties of the deposited films as well as the stability study under different experimental conditions were investigated. Taking advantage of the electrochemical behavior, an analytical method based on differential pulse voltammetry for determination of caffeic acid in red wine was proposed.

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“…18 However, GC is considered to be a nonporous, impermeable and somewhat hydrophobic material, which has subsequently made metals like gold hard to deposit on it. [19][20][21] Given all that, GC oxidation treatment has shown potential of increasing adhesion of metals to GC surfaces. Thermochemical oxidation and electrochemical oxidation pre-treatment of the GC are the two methods that have been reported to address the GC drawbacks as substrate.…”

Section: Npg Based Catalyst On Glassy Carbon (Gc)mentioning

confidence: 99%

Enhanced Adhesion of Ultrathin Nanoporous Au Deposits by Electrochemical Oxidation of Glassy Carbon

Xia

Rooney

Ambrozik

et al. 2015

J. Electrochem. Soc.

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Electrochemical (EO) and Thermochemical (TO) oxidation have been considered as means for improved adhesion of metals to glassy carbon (GC) substrates. This paper is aimed at studying the effect of EO on the all-electrochemical processing of nanoporous gold (NPG) catalysts with emphasis on their adhesion to a GC substrate. It has been shown by two independent assessment approaches that EO improves twice the amount of retained NPG on GC helping to keep about 90% originally existing material after a two-hour rotation disk electrode test at 1600 rpm. This work also demonstrates that EO modifies the GC in a way making it more passive in the alloy deposition and subsequent dealloying processes. This effect results in a progressive nucleation density decrease with the depth of oxidation which in turn leads to a lack of continuity of the NPG layer. This trend is also accompanied by a decrease in deposition efficiency as a substantial part of the cathodic current is spent on the reduction of the pre-oxidized GC surface. Our study identifies the best outcome of the trade-off scenario between nucleation density, deposition efficiency and adhesion strength to be associated with depth of oxidation in the range 0.10 to 0.25 μm. NPG based catalyst on glassy carbon (GC).-Nanoporous Au (NPG) is a nano-material with three dimensional (3D) continuous structure featuring Au with interconnected nano-sized pores and ligaments.1 NPG and other nanoporous metals have been intensively investigated in recent years. This conductive material has an open, 3D porous framework with surface areas that even in an ultrathin NPG layer configuration could be an order of magnitude larger than the area of planar Au. Besides its continuous crystal lattice throughout the porous network, it has a pore size that is adjustable via simple thermal post-processing, which makes it potentially applicable in various fields such as electro-and gas-phase catalysis, optics, sensors and actuators. [2][3][4][5] It is known that nanoparticulate gold possesses remarkable catalytic activity toward oxidation reactions, should the particles be well supported and smaller than 5 nmin size. 6 Recently, ultrathin films of NPG have been shown to serve as catalysts for fuel cell applications as an alternative to their nanoparticle (NP) counterparts.7-9 These films are generated electrochemically under precise potential/current control, which minimizes material loss and surface contamination over the multi-step NP synthetic routines. 7,10 Compared to nanoparticle synthesis which often lacks control due to the large number of the processing steps, ultra thin films of NPG are cost effective, simple to fabricate, and show better reproducibility in terms of quality and reactivity. Another advantage of NPG films is that the edge effect that lowers the catalytic activity characteristic for NP based catalysts does not exist in NPG films due to its continuous nature. 11In our previous work, we established an all-electrochemical synthetic method for a NPG-based catalyst that maximized t...

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Glassy carbon electrodes

Cited by 287 publications

References 27 publications

Thin film pyrolytic carbon electrodes: A new class of carbon electrode for electroanalytical sensing applications

Thin film pyrolytic carbon electrodes: A new class of carbon electrode for electroanalytical sensing applications

Determination of Caffeic Acid in Red Wine by Voltammetric Method

Enhanced Adhesion of Ultrathin Nanoporous Au Deposits by Electrochemical Oxidation of Glassy Carbon

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