The Experts below are selected from a list of 21393 Experts worldwide ranked by ideXlab platform
Richard G. Compton - One of the best experts on this subject based on the ideXlab platform.
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Gas sensing using edge-plane Pyrolytic-Graphite electrodes: electrochemical reduction of chlorine.
Analytical and bioanalytical chemistry, 2005Co-Authors: Eleanor R. Lowe, Craig E Banks, Richard G. ComptonAbstract:The voltammetric responses of chlorine in aqueous acid solutions have been explored using different carbon-based electrodes. Edge-plane Pyrolytic Graphite has more electrochemical reversibility than glassy carbon, basal-plane Pyrolytic Graphite, or boron-doped diamond electrodes. A significant reduction in the overpotential is observed on the edge-plane Pyrolytic-Graphite electrode in contrast with the other carbon-based electrode substrates. These results suggest that edge-plane Pyrolytic Graphite can be optimally used as the working electrodes in Clark-cell devices for low-potential amperometric gas sensing of Cl2.
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edge plane Pyrolytic Graphite electrodes for stripping voltammetry a comparison with other carbon based electrodes
Electroanalysis, 2005Co-Authors: Frederic Wantz, Craig E Banks, Richard G. ComptonAbstract:The first examples of using edge plane Pyrolytic Graphite electrodes for anodic and cathodic stripping voltammetry (ASV and CSV) are presented, notably the ASV of silver and the CSV of manganese. In the former example, detection limits for silver (based on 3σ) of 8.1 nM and 0.185 nM for 120 s and 300 s accumulation time, respectively, were achievable using the edge plane electrode, which were superior to those observed on glassy carbon, basal plane Pyrolytic Graphite and boron-doped diamond electrodes. In the second example, a detection limit for manganese of 0.3 μM was possible which was comparable with that achievable with a boron-doped diamond electrode but with an increased sensitivity. Comparison of the edge plane Pyrolytic Graphite electrode with boron-doped diamond electrodes reveals that the edge plane electrode has comparable detection limits and sensitivities whilst exhibiting a lower signal-to-noise ratio and large potential window for use in trace analysis suggesting boron-doped diamond can be conveniently replaced by edge plane Pyrolytic Graphite as an electrode material in many applications.
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Edge Plane Pyrolytic Graphite Electrodes for Halide Detection in Aqueous Solutions
Electroanalysis, 2005Co-Authors: Eleanor R. Lowe, Craig E Banks, Richard G. ComptonAbstract:The behavior of chloride, bromide and iodide at edge plane Pyrolytic Graphite electrodes has been explored in aqueous acid solutions. The voltammetric response in each case has been compared with that of basal plane Pyrolytic Graphite, glassy carbon and boron-doped diamond. The electrochemical oxidation of chloride is found to only occur on boron-doped diamond while the electrochemical reversibility for the oxidation of bromide on edge plane Pyrolytic Graphite is similar to that seen at glassy carbon whilst being superior to basal plane Pyrolytic Graphite and boron-doped diamond. In the case of iodide oxidation, edge plane and basal plane Pyrolytic Graphite and glassy carbon display similar electrode kinetics but are all superior to boron-doped diamond. The analytical possibilities were examined using the edge plane Pyrolytic Graphite electrode for both iodide and bromine where is was found that, based on cyclic voltammetry, detection limits in the order of 10−6 M are possible.
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Edge plane Pyrolytic Graphite electrodes in electroanalysis: an overview.
Analytical sciences : the international journal of the Japan Society for Analytical Chemistry, 2005Co-Authors: Craig E Banks, Richard G. ComptonAbstract:The recent development, behavior and scope of edge plane Pyrolytic Graphite electrodes in electroanalysis are overviewed. Similarities to, and advantages, over multi-walled CNT modified electrodes are noted and the wide scope of applications, ranging through gas sensing, stripping voltammetry and biosensing, illustrated.
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electrocatalytic detection of thiols using an edge plane Pyrolytic Graphite electrode
Analyst, 2004Co-Authors: Ryan R Moore, Craig E Banks, Richard G. ComptonAbstract:The first example of using an edge plane Pyrolytic Graphite electrode in electroanalysis is reported as the determination of homocysteine, N-acetylcysteine, cysteine and glutathione is studied. The response of the electrode in the direct oxidation of thiol moieties is explored and found to be electrocatalytic producing a reduction in the overpotential while having enhanced signal-to-noise characteristics compared to glassy carbon and basal plane Pyrolytic Graphite electrodes. The effectiveness of the methodology is examined in the determination of cysteine species in a growth tissue media that contains a high number of common biological interferences. The advantageous properties of this electrode for thiol determination lie in its excellent catalytic activity, sensitivity and simplicity.
Craig E Banks - One of the best experts on this subject based on the ideXlab platform.
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CVD graphene vs. highly ordered Pyrolytic Graphite for use in electroanalytical sensing
The Analyst, 2011Co-Authors: Dale A. C. Brownson, Roman V. Gorbachev, Sarah J. Haigh, Craig E BanksAbstract:We explore and contrast the electroanalytical performance of a commercially available CVD grown graphene electrode with that of edge- and basal- plane Pyrolytic Graphite electrodes constructed from highly ordered Pyrolytic Graphite for the sensing of biologically important analytes, namely β-nicotinamide adenine dinucleotide (NADH) and uric acid (UA). We demonstrate that for the analytes studied here, in the best case, the electroanalytical performance of the CVD-graphene mimics that of edge plane Pyrolytic Graphite, suggesting no significant advantage of utilising CVD-graphene in this context.
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Gas sensing using edge-plane Pyrolytic-Graphite electrodes: electrochemical reduction of chlorine.
Analytical and bioanalytical chemistry, 2005Co-Authors: Eleanor R. Lowe, Craig E Banks, Richard G. ComptonAbstract:The voltammetric responses of chlorine in aqueous acid solutions have been explored using different carbon-based electrodes. Edge-plane Pyrolytic Graphite has more electrochemical reversibility than glassy carbon, basal-plane Pyrolytic Graphite, or boron-doped diamond electrodes. A significant reduction in the overpotential is observed on the edge-plane Pyrolytic-Graphite electrode in contrast with the other carbon-based electrode substrates. These results suggest that edge-plane Pyrolytic Graphite can be optimally used as the working electrodes in Clark-cell devices for low-potential amperometric gas sensing of Cl2.
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edge plane Pyrolytic Graphite electrodes for stripping voltammetry a comparison with other carbon based electrodes
Electroanalysis, 2005Co-Authors: Frederic Wantz, Craig E Banks, Richard G. ComptonAbstract:The first examples of using edge plane Pyrolytic Graphite electrodes for anodic and cathodic stripping voltammetry (ASV and CSV) are presented, notably the ASV of silver and the CSV of manganese. In the former example, detection limits for silver (based on 3σ) of 8.1 nM and 0.185 nM for 120 s and 300 s accumulation time, respectively, were achievable using the edge plane electrode, which were superior to those observed on glassy carbon, basal plane Pyrolytic Graphite and boron-doped diamond electrodes. In the second example, a detection limit for manganese of 0.3 μM was possible which was comparable with that achievable with a boron-doped diamond electrode but with an increased sensitivity. Comparison of the edge plane Pyrolytic Graphite electrode with boron-doped diamond electrodes reveals that the edge plane electrode has comparable detection limits and sensitivities whilst exhibiting a lower signal-to-noise ratio and large potential window for use in trace analysis suggesting boron-doped diamond can be conveniently replaced by edge plane Pyrolytic Graphite as an electrode material in many applications.
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Edge Plane Pyrolytic Graphite Electrodes for Halide Detection in Aqueous Solutions
Electroanalysis, 2005Co-Authors: Eleanor R. Lowe, Craig E Banks, Richard G. ComptonAbstract:The behavior of chloride, bromide and iodide at edge plane Pyrolytic Graphite electrodes has been explored in aqueous acid solutions. The voltammetric response in each case has been compared with that of basal plane Pyrolytic Graphite, glassy carbon and boron-doped diamond. The electrochemical oxidation of chloride is found to only occur on boron-doped diamond while the electrochemical reversibility for the oxidation of bromide on edge plane Pyrolytic Graphite is similar to that seen at glassy carbon whilst being superior to basal plane Pyrolytic Graphite and boron-doped diamond. In the case of iodide oxidation, edge plane and basal plane Pyrolytic Graphite and glassy carbon display similar electrode kinetics but are all superior to boron-doped diamond. The analytical possibilities were examined using the edge plane Pyrolytic Graphite electrode for both iodide and bromine where is was found that, based on cyclic voltammetry, detection limits in the order of 10−6 M are possible.
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Edge plane Pyrolytic Graphite electrodes in electroanalysis: an overview.
Analytical sciences : the international journal of the Japan Society for Analytical Chemistry, 2005Co-Authors: Craig E Banks, Richard G. ComptonAbstract:The recent development, behavior and scope of edge plane Pyrolytic Graphite electrodes in electroanalysis are overviewed. Similarities to, and advantages, over multi-walled CNT modified electrodes are noted and the wide scope of applications, ranging through gas sensing, stripping voltammetry and biosensing, illustrated.
Rajendra N. Goyal - One of the best experts on this subject based on the ideXlab platform.
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Oxidation of 2-aminoquinoline at a stationary Pyrolytic Graphite electrode
Analytica Chimica Acta, 2002Co-Authors: N.c. Mathur, Rajendra N. Goyal, W.u. MalikAbstract:Abstract The oxidation of 2-aminoquinoline was studied at a stationary Pyrolytic Graphite electrode in methanol-phosphate buffer at 25°C using various electroanalytical techniques. In the entire pH range (2.2–10.4), 2-aminoquinoline is oxidized and exhibits a well defined oxidation peak following a 2e − , 2H + process to give, 2,2′-azoquinoline as the major product. The linear relationship between peak current at a Pyrolytic Graphite electrode and concentration indicated that 2-aminoquinoline can be determined in the concentration range 0.1–1.0 mM. On the basis of cyclic voltammetry, spectral studies and controlled-potential coulometry, a mechanism of the electrode process is proposed.
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Electrochemical oxidation of sulphapyridine at a Pyrolytic Graphite electrode
Analytica Chimica Acta, 2001Co-Authors: Rajendra N. Goyal, Alok MittalAbstract:Abstract The electrochemical oxidation of sulphapyridine at a Pyrolytic Graphite electrode was studied over a wide pH range. Sulphapyridine is oxidized in an irreversible reaction involving two electrons and two protons to give an electroactive product. On the basis of voltammetric, spectral and coulometric studies and product identification, a tentative mechanism is suggested.
Eleanor R. Lowe - One of the best experts on this subject based on the ideXlab platform.
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Gas sensing using edge-plane Pyrolytic-Graphite electrodes: electrochemical reduction of chlorine.
Analytical and bioanalytical chemistry, 2005Co-Authors: Eleanor R. Lowe, Craig E Banks, Richard G. ComptonAbstract:The voltammetric responses of chlorine in aqueous acid solutions have been explored using different carbon-based electrodes. Edge-plane Pyrolytic Graphite has more electrochemical reversibility than glassy carbon, basal-plane Pyrolytic Graphite, or boron-doped diamond electrodes. A significant reduction in the overpotential is observed on the edge-plane Pyrolytic-Graphite electrode in contrast with the other carbon-based electrode substrates. These results suggest that edge-plane Pyrolytic Graphite can be optimally used as the working electrodes in Clark-cell devices for low-potential amperometric gas sensing of Cl2.
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Edge Plane Pyrolytic Graphite Electrodes for Halide Detection in Aqueous Solutions
Electroanalysis, 2005Co-Authors: Eleanor R. Lowe, Craig E Banks, Richard G. ComptonAbstract:The behavior of chloride, bromide and iodide at edge plane Pyrolytic Graphite electrodes has been explored in aqueous acid solutions. The voltammetric response in each case has been compared with that of basal plane Pyrolytic Graphite, glassy carbon and boron-doped diamond. The electrochemical oxidation of chloride is found to only occur on boron-doped diamond while the electrochemical reversibility for the oxidation of bromide on edge plane Pyrolytic Graphite is similar to that seen at glassy carbon whilst being superior to basal plane Pyrolytic Graphite and boron-doped diamond. In the case of iodide oxidation, edge plane and basal plane Pyrolytic Graphite and glassy carbon display similar electrode kinetics but are all superior to boron-doped diamond. The analytical possibilities were examined using the edge plane Pyrolytic Graphite electrode for both iodide and bromine where is was found that, based on cyclic voltammetry, detection limits in the order of 10−6 M are possible.
Yuchen Tsai - One of the best experts on this subject based on the ideXlab platform.
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graphene modified basal and edge plane Pyrolytic Graphite electrodes for electrocatalytic oxidation of hydrogen peroxide and β nicotinamide adenine dinucleotide
Electrochemistry Communications, 2009Co-Authors: Chienshiun Liao, Jiahao Jhang, Yuchen TsaiAbstract:Abstract Graphene was cast on basal and edge plane Pyrolytic Graphite electrodes for electrochemical applications. The morphology of the resulting graphene modified electrode was investigated by atomic force microscopy. In cyclic voltammetric responses, both anodic and cathodic peak currents varied linearly with the square root of scan rates over the range of 25–600 mV in 0.1 M KCl containing 5 mM Fe ( CN ) 6 4 - at graphene modified basal and edge plane Pyrolytic Graphite electrodes, which suggests a diffusion-controlled process. The graphene modified basal and edge plane Pyrolytic Graphite electrodes exhibited the abilities to lower the electrooxidation potentials of β-nicotinamide adenine dinucleotide and hydrogen peroxide in comparison with bare basal and edge plane Pyrolytic Graphite electrodes. The electrocatalytic behavior obtained at the graphene modified basal and edge plane Pyrolytic Graphite electrodes may led to new applications in electroanalysis.
