Poly-phenothiazine derivative-modified glassy carbon electrode for NADH electrocatalytic oxidation

Gligor, Delia; Dilgin, Yusuf; Popescu, Ionel Cătălin; Gorton, Lo

doi:10.1016/j.electacta.2008.11.053

Cited by 54 publications

(27 citation statements)

References 31 publications

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“…À0.25 V (vs. Ag/AgCl) decrease gradually while another peaks centered at ca. 0 V (vs. Ag/AgCl) increase as scan cycles, suggesting the formation of polyMB [33][34][35][36]. However, the current of polyMB on GO support ( Figure 3B) is much lower, which can be explained that the carboxyl on GO disrupt sp 2 networks and undoubtedly reduce the conductivity.…”

Section: Preparation and Characterization Of Polymb-crgo And Polymb-ementioning

confidence: 80%

“…Besides, carbon nanotubes (CNT) were also widely employed in electrocatalysis due to its high surface area and high conductivity [28][29][30][31][32]. The CNTs/poly(phenoxazine) dye composites were employed because of their combined superior electrochemical properties [33][34][35][36]. Recently, graphene has been applied as a robust substrate for the electrocatalytic of NADH [6,[37][38][39][40].…”

Section: Introductionmentioning

confidence: 99%

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Comparative Studies on Electrocatalytic Activities of Chemically Reduced Graphene Oxide and Electrochemically Reduced Graphene Oxide Noncovalently Functionalized with Poly(methylene blue)

et al. 2010

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This study compares the electrocatalytic activities of chemically reduced graphene oxide (crGO) and electrochemically reduced graphene oxide (erGO), which are both noncovalently functionalized with a polyaromatic dye, poly-(methylene blue) (polyMB), toward the oxidation of b-nicotinamide adenine dinucleotide (NADH). PolyMB-crGO and polyMB-erGO composites were obtained via electropolymerization of methylene blue on crGO and GO modified glassy carbon (GC) electrodes, respectively. Cyclic voltammetry (CV) results indicate that these two types of integrated electrodes reveal different electrocatalytic activities. PolyMB-crGO integrated electrode possesses lower catalytic oxidation potential, suggesting higher catalytic activity. The present study is helpful for the understanding and screening of graphene-based advanced carbon nanomaterials for potential electrochemical applications.

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Section: Preparation and Characterization Of Polymb-crgo And Polymb-ementioning

confidence: 80%

Section: Introductionmentioning

confidence: 99%

Comparative Studies on Electrocatalytic Activities of Chemically Reduced Graphene Oxide and Electrochemically Reduced Graphene Oxide Noncovalently Functionalized with Poly(methylene blue)

et al. 2010

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“…Polymerization Toluidine blue (Cai and Xue 1998;Zhou et al 1998), methylene green (Zhou et al 1996), bisphenothiazin-3-yl methane (Gligor et al 2009b Covalent linkage Toluidine blue (Ju et al 2002;Schlereth et al 1994),…”

Section: )mentioning

confidence: 99%

“…Furthermore, there was no loss of redox activity after storing the modified electrode in a buffer solution for 1 week. The decrease of the surface coverage of a poly(bis-phenothiazin-3-yl methane)-modified electrode has been estimated to be as low as 2×10 −16 mol cm −2 s −1 (Gligor et al 2009b). Saleh et al have compared two different electrode materials modified with poly(phenosafranine) for the oxidation of NADH (Saleh et al 2011b).…”

Section: Electropolymerization Of Mediatorsmentioning

confidence: 99%

Immobilized redox mediators for electrochemical NAD(P)+ regeneration

Kochius

Magnusson

Hollmann

et al. 2012

Appl Microbiol Biotechnol

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The applicability of dissolved redox mediators for NAD(P) + regeneration has been demonstrated several times. Nevertheless, the use of mediators in solutions for sensor applications is not a very convenient strategy since the analysis is not reagentless and long stabilization times occur. The most important drawbacks of dissolved mediators in biocatalytic applications are interferences during product purification, limited reusability of the mediators, and their cost-intensive elimination from wastewater. Therefore, the use of immobilized mediators has both economic and ecological advantages. This work critically reviews the current stateof-art of immobilized redox mediators for electrochemical NAD(P) + regeneration. Various surface modification techniques, such as adsorption polymerization and covalent linkage, as well as the corresponding NAD(P) + regeneration rates and the operational stability of the immobilized mediator films, will be discussed. By comparison with other existing regeneration systems, the technical potential and future perspectives of biocatalytic redox reactions based on electrochemically fed immobilized mediators will be assessed.

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“…Therefore, it is essential to develop an electrode, which can catalyze the oxidation of NADH at less positive potential. Various methodologies have been developed to settle this problem, as indicated by mediators modified electrodes [5,6], carbon nanotubes modified electrodes [7], mediator immobilized carbon nanotubes [8] and so on.…”

Section: Introductionmentioning

confidence: 99%

A Simple and Effective Way to Integrate Nile Blue Covalently onto Functionalized SWCNTs Modified GC Electrodes for Sensitive and Selective Electroanalysis of NADH

et al. 2010

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A simple and new way to assemble Nile blue (NB) covalently onto the surface of functionalized single-walled carbon nanotubes (f-SWCNTs) modified glassy carbon (GC) electrode (NB/f-SWCNTs/GC electrode) was described. The NB/f-SWCNTs/GC electrode catalyzes effectively the oxidation of NADH with a remarkably decreased overpotential (ca. 700 mV) compared with that at the bare GC. The reaction was found to obey a so-called Michaelis-Menten kinetics and the related kinetic parameters were determined. This modified electrode possesses promising characteristics as NADH sensor; a wide linear dynamic range of 0.2 to 200 mM, low detection limit of 0.18 mM, fast response time (1-2 s), high sensitivity (24 mA cm À2 mM À1), anti-interference ability and anti-fouling.

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Poly-phenothiazine derivative-modified glassy carbon electrode for NADH electrocatalytic oxidation

Cited by 54 publications

References 31 publications

Comparative Studies on Electrocatalytic Activities of Chemically Reduced Graphene Oxide and Electrochemically Reduced Graphene Oxide Noncovalently Functionalized with Poly(methylene blue)

Comparative Studies on Electrocatalytic Activities of Chemically Reduced Graphene Oxide and Electrochemically Reduced Graphene Oxide Noncovalently Functionalized with Poly(methylene blue)

Immobilized redox mediators for electrochemical NAD(P)+ regeneration

A Simple and Effective Way to Integrate Nile Blue Covalently onto Functionalized SWCNTs Modified GC Electrodes for Sensitive and Selective Electroanalysis of NADH

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