Rhodium stabilized Prussian Blue-modified graphite electrodes for H2O2 amperometric detection

Mureşan, Laura; Turdean, Graziella Liana; Popescu, Ionel Cătălin

doi:10.1007/s10800-007-9446-6

Cited by 9 publications

(2 citation statements)

References 42 publications

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“…Polymeric materials with redox properties are used in applications as diverse as biofuel cells, − batteries, , bioelectronics, responsive membranes, and biosensors. − Redox polymers containing the ferrocenyl or vinyl ferrocene group as an electroactive functionality, in particular, are well-studied because they possess high redox activity and chemical stability, with electrochemical behavior quite similar to that of free ferrocene in solution. One application of poly(vinylferrocene) is as a polymeric mediator in the fabrication of glucose biosensors. − These biosensors have been prepared by a variety of means, such as cross-linking ferrocene-containing acrylamide–acrylic acid copolymers or ferrocene-containing poly(allylamine) with glucose oxidase on the surfaces of glassy carbon electrodes, , electrochemical codeposition of the redox monomers and enzymes on the surfaces of platinum electrodes, and cross-linking and immobilization of the polymers and enzymes within carbon paste, resulting in the formation of stable electrodes based on ferrocene-containing polymers .…”

Section: Introductionmentioning

confidence: 99%

Interplay of Electron Hopping and Bounded Diffusion during Charge Transport in Redox Polymer Electrodes

2012

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Redox polymer electrodes (RPEs) have been prepared both by attachment of random copolymers of hydroxybutyl methacrylate and vinylferrocene (poly(HBMA-co-VF)) to carbon substrates by grafting either "to" or "from" the substrate surfaces, and by impregnation of porous carbon substrates with redox polymer gels of similar composition. An observed linear dependence of peak current on the square root of the applied voltage scan rate in cyclic voltammetry (CV) led to the conclusion that the rate controlling step in the redox process was the diffusive transfer of electrons through the redox polymer layer. The variation in the peak current with increasing concentration of the redox species in the polymer indicated that the electron transport transitioned from bounded diffusion to electron hopping. A modified form of the Blauch-Saveant equation for apparent diffusivity of electrons through a polymer film indicated that bounded diffusion was the dominant mechanism of electron transport in RPEs with un-cross-linked polymer chains at low concentrations of the redox species, but, as the concentration of the redox species increased, electron hopping became more dominant, and was the primary mode of electron diffusion above a certain concentration level of redox species. In the cross-linked polymer gels, bounded diffusion was limited because of the restricted mobility of the polymer chains. Electron hopping was the primary mode of electron diffusion in such systems at all concentrations of the redox species.

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Section: Introductionmentioning

confidence: 99%

Interplay of Electron Hopping and Bounded Diffusion during Charge Transport in Redox Polymer Electrodes

2012

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“…Rhodium/graphene hybrids have been used for hydrogen peroxide oxidation with enhanced activity in presence of rhodium . Rhodium stabilized Prussian Blue‐modified graphite electrodes have been designed for hydrogen peroxide reduction by researchers and they reported that the rhodium modified electrode exhibited a higher relative stability in comparison to the unmodified electrode . A rhodium modified amperometric biosensor based on the introduced ceramic‐carbon composite electrode has been developed.…”

Section: Introductionmentioning

confidence: 99%

Novel Enzymatic Rhodium Modified Poly(styrene‐g‐oleic amide) Film Electrode for Hydrogen Peroxide Detection

2017

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Newly synthesized poly(styrene‐g‐oleic amide) was coated onto a rhodium nanoparticle modified glassy carbon (GC) surface for the fabrication of horseradish peroxidase based biosensor used for hydrogen peroxide detection. The rhodium modifed electrode presented ten times higher signal than unmodified electrode even at low elecrtroactive enzyme quantity by enhancing the electron transfer rate at the applied potential of −0.65 V. The biosensor designed by under the optimized rhodium electrodeposition time exhibited a fast response less than 5 s, an excellent operational stability with a relative standard deviation of 0.6 % (n=6), an accuracy of 96 % and a large linear range between 50 μM and 120 mM for hydrogen peroxide. Detection limit and the sensitivity parameters were calculated to be 44 μM and 57 μA mM−1 cm−2, respectively by preserving its entire initial response up to the 15 days, while only 20 % of its initial response was lost at the end of one month.

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Vertically Aligned CuO Nanowires Based Electrode for Amperometric Detection of Hydrogen Peroxide

et al. 2008

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Vertically aligned copper oxide (CuO) nanowires were synthesized by directly heating copper foil on a hotplate under ambient conditions. The as-grown CuO nanowires film is mechanically stable and was facilely attached to a glassy carbon (GC) electrode, offering an excellent electrochemical sensing platform. The CuO nanowires electrode shows excellent electrocatalytic response to H 2 O 2 with significantly lower overpotentials for its oxidation and reduction and also exhibits a fast response and high sensitivity for the amperometric detection of H 2 O 2 . The novel vertically aligned CuO nanowires electrode is readily applicable to other analytes and has great potential applications in the electrochemical detection.Keywords: CuO, Nanowires, Reduction, Oxidation, Hydrogen peroxide DOI: 10.1002/elan.200804299 Hydrogen peroxide (H 2 O 2 ), a strong oxidant, has been widely used in many fields, including food production [1 -3], pulp and paper bleaching [4,5], sterilization [6], the oxidation of organic substances [7 -9], liquid-based fuel cells [10 -14], and clinical applications [15,16]. H 2 O 2 is also readily present in a variety of commercial products such as cosmetic and pharmaceutical products [17]. Furthermore, as a product of enzymatic reactions catalyzed by a large number of oxidases, H 2 O 2 concentration can be correlated to the concentration of target substrates, thus is practically important in the field of biosensor development [18 -22]. Consequently, there are growing interests to study the oxidation and reduction of H 2 O 2 at different electrode surfaces, and the detection and quantification of H 2 O 2 still remains a significant endeavor in various fields.In the past decades, many analytical methods, such as titration [23], spectrophotometric [24,25], fluorometric [26,27], chemiluminescence [28,29], and chromatographic [30 -32] techniques have been developed for the detection and quantification of H 2 O 2 . Although sensitive and reliable, these methods are either time-consuming or expensive, and/ or require skilled personnel, therefore they are unsuitable for rapid and cost-effective determination of H 2 O 2 . Thus, electrochemical methods have emerged as a preferable alternative, owing to their relatively low cost, efficiency, high sensitivity, and ease of operation [33 -41]. With the development of nanotechnology, new efforts have been emphasized on using novel nanomaterials to reduce the overpotentials for H 2 O 2 oxidation and reduction and minimize the interference. CuO, a p-type semiconductor with a narrow band gap of 1.2 eV, is promising in such application because CuO nanostructures have unique advantages including the high specific surface area, chemical stability, electrochemical activity, and high electron communication features. Recently CuO nanoparticles were immobilized on a Nafion membrane coated platinum electrode and proved to perform well as H 2 O 2 reduction catalysts in a strong basic solution (0.1 M NaOH) as CuO nanoparticles play an important role in transferring el...

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Rhodium stabilized Prussian Blue-modified graphite electrodes for H2O2 amperometric detection

Cited by 9 publications

References 42 publications

Interplay of Electron Hopping and Bounded Diffusion during Charge Transport in Redox Polymer Electrodes

Interplay of Electron Hopping and Bounded Diffusion during Charge Transport in Redox Polymer Electrodes

Novel Enzymatic Rhodium Modified Poly(styrene‐g‐oleic amide) Film Electrode for Hydrogen Peroxide Detection

Vertically Aligned CuO Nanowires Based Electrode for Amperometric Detection of Hydrogen Peroxide

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