Electrochemical characterization of carbohydrate oxidation at copper electrodes

Marioli, Juan M.; Kuwana, Theodore

doi:10.1016/0013-4686(92)85055-p

Cited by 329 publications

(232 citation statements)

References 30 publications

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“…This formation of formate indicates that complete C-C bond cleavage occurs. This is also in agreement with the findings of Marioli and Kuwana [20] who concluded that the oxidation of glucose may proceed beyond the formation of gluconic or glucuronic acids to give lower molecular weight products and fragmentation of the carbohydrate carbon skeleton. There may be some evidence for the formation of six carbon derivatives, form the additional absorptions in the 3.0-3.8 ppm region following electrolysis (Fig.…”

Section: Photo-induced Oxidation Of Glucose At the Composite Electrodesupporting

confidence: 93%

“…These currents continue to increase up to a potential of 0.65 V/(Ag|AgCl). This agrees with the proposed involvement of copper (II) and copper (III) surface species in the oxidation of glucose, as Cu(II) and Cu(III) species are present in this potential range [20]. On the reverse cycle, there is further oxidation of glucose.…”

Section: Preparation and Electrochemical Characterization Of The Modisupporting

confidence: 89%

“…According to the model proposed by Marioli and Kuwana [20] for the oxidation of glucose, the oxidation is initiated by the deprotonation of the carbohydrate and isomerization to the enediol form followed by adsorption onto the electrode surface. Carbohydrate is then oxidized by the Cu(II) and Cu(III) surface states.…”

Section: Photo-induced Oxidation Of Glucose At the Composite Electrodementioning

confidence: 99%

“…Johnson and co-workers [14,15] in studying the oxidation of glucose at a number of copper alloys have explained the enhanced oxidation at a Mn 5 Cu 95 in terms of the Mn sites functioning as Lewis acid sites for adsorption of the polar glucose molecule, while they have interpreted the oxidation at a Ni 10 Cu 90 alloy in terms of a redox-mediated mechanism. Marioli and Kuwana [20] have identified the interaction of the glucose with the oxide/hydroxide layer as an important step in the subsequent oxidation of the molecule. This interaction is initially observed with the Cu(I) oxidation state, although interaction may also occur with the Cu(II) state once it is formed.…”

Section: Introductionmentioning

confidence: 99%

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Oxidation and photo-induced oxidation of glucose at a polyaniline film modified by copper particles

Farrell

Breslin

2004

Electrochimica Acta

116

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The oxidation and photo-induced oxidation of glucose at a copper-dispersed polyaniline film was studied in an alkaline hydroxide solution. It was found that the copper-dispersed polyaniline electrode was capable of oxidizing glucose at potentials between 0.2 and 0.75 V/(Ag|AgCl), with the rate of oxidation being higher than that observed at a bulk copper electrode. On irradiation of the composite with polychromatic UV light, a further increase in the rate of the glucose oxidation reaction was observed. Formate was identified as the main product of the glucose oxidation reaction under both light and dark conditions using 1 H NMR spectrometry. This suggests that illumination does not alter significantly the reaction pathway.

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Section: Photo-induced Oxidation Of Glucose At the Composite Electrodesupporting

confidence: 93%

Section: Preparation and Electrochemical Characterization Of The Modisupporting

confidence: 89%

Section: Photo-induced Oxidation Of Glucose At the Composite Electrodementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Oxidation and photo-induced oxidation of glucose at a polyaniline film modified by copper particles

Farrell

Breslin

2004

Electrochimica Acta

116

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“…Some investigations also have been carried out with copper and its oxides, based on intensive studies of their intrinsic activity and the conversion mechanism [7,8]. In general, the usage of cuprite (Cu 2O) benefits from its low oxidation potential in alkaline solutions that consequently leads to enhanced sensitivities compared to more noble metals, although the stability of the material lacks in acidic media.…”

Section: Introductionmentioning

confidence: 99%

Facile wet-chemical synthesis of differently shaped cuprous oxide particles and a thin film: Effect of catalyst morphology on the glucose sensing performance

Neetzel

Muench

Matsutani

et al. 2015

Sensors and Actuators B: Chemical

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In this work, different facile synthesis routes were developed to create cuprite-based catalyst systems for the amperometric detection of glucose, allowing us to evaluate the impact of important electrode fabrication parameters on the glucose sensing performance. Using homogenous precipitation routes based on a redox system, two differently shaped cuprite particles-skeletons and polyhedrons-could be obtained. Furthermore, a novel electroless deposition technique was introduced that does not require sensitization and activation pretreatments, allowing for the direct modification of the glassy carbon. This technique produced electrodes with dense thin film consisting of merged, octahedral cuprite crystals. Afterward, these materials were tested as potential catalysts for the electrochemical detection of glucose. While the catalyst powders obtained by precipitation required Nafion ® to be attached to the electrode, the thin film synthesized using electroless plating could be realized with and without additive. Summarizing the results, it was found that Nafion ® was not required to achieve glucose selectivities typically observed for cuprite catalysts. Also, the type of catalyst application (direct plating versus ink drop coating) and the particle shape had a pronounced effect on the sensing performance. Compared to the thin film, the powder-type materials showed significantly increased electrochemical responses. The best overall performance was achieved with the polyhedral cuprite particles, resulting in a high sensitivity of 301 µA . mmol -1 cm -2 , a linear range up to 298 µmol . L -1 and a limit of detection of 0.144 µmol . L -1 .2

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HPLC Analysis of Carbohydrates with Electrochemical Detection at a Poly-1-naphthylamine/Copper Modified Electrode

D’Eramo¹,

Marioli²,

Arévalo³

et al. 1999

Electroanalysis

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Carbohydrates are detected by constant potential amperometric detection at a modi®ed electrode consisting of poly-1-naphthylamine coated glassy carbon with copper ions incorporated into the polymeric matrix. The polymer is electrodeposited onto the glassy carbon surface by cyclic voltammetric experiments, and copper ions incorporated by immersion of the modi®ed electrode in a 0.10 M cupric ions solution. The amount of copper incorporated into the polymeric matrix is regulated by controlling the immersion time. Cyclic voltammetric experiments showed that glucose was oxidized at the modi®ed electrode surface. The catalytic current for glucose oxidation was dependent on the amount of copper incorporated. Flow injection experiments allowed the determination of the working electrode potential at which maximum signal-to-noise ratios were obtained. The electrode was successfully used in the high performance liquid chromatographic analysis of various carbohydrates.

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Electrochemical characterization of carbohydrate oxidation at copper electrodes

Cited by 329 publications

References 30 publications

Oxidation and photo-induced oxidation of glucose at a polyaniline film modified by copper particles

Oxidation and photo-induced oxidation of glucose at a polyaniline film modified by copper particles

Facile wet-chemical synthesis of differently shaped cuprous oxide particles and a thin film: Effect of catalyst morphology on the glucose sensing performance

HPLC Analysis of Carbohydrates with Electrochemical Detection at a Poly-1-naphthylamine/Copper Modified Electrode

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