Electrocatalytic oxidation of NADH with Meldola's blue functionalized carbon nanotubes electrodes

Zhu, Lihua; Zhai, Jiangli; Yang, Rui; Tian, Chunyuan; Guo, Liping

doi:10.1016/j.bios.2006.12.027

Cited by 94 publications

(46 citation statements)

References 29 publications

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“…The similar results using by CNT and the other mediator have been reported. 6,11 However, our advantage of NR realized the lower potential (¹0.2 V) than those previous report (¹0.1 V 6,11 ). Figure 3 shows the steady-state amperometric response at ¹0.2 V vs. Ag/AgCl of the electrode.…”

Section: Resultsmentioning

confidence: 47%

Selective Detection of NADH with Neutral Red Functionalized Carbon Nanotube/Plasma-polymerized Film Composite Electrode

Hoshino

Muguruma

2012

Electrochemistry

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A novel fabrication approach for electrochemical sensing of nicotinamide adenine dinucleotide (NADH) using neutral red (NR) functinalized carbon nanotube/plasma-polymerized film (PPF) composite electrode is reported. The configuration of sensing electrode was NR-functionalized CNTs sandwiched between two acetonitrile PPFs on sputtered gold thin film. The NR as an electron transfer mediator shuttles the electron from CNT to gold electrode. Due to the synergistic effect between NR and CNT, the resulting electrode showed the lower detection potential and the larger sensitivity (current) than that with NR or CNT alone. As a result, the electrode showed the selectivity against the interference ascorbic acid.

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Section: Resultsmentioning

confidence: 47%

Selective Detection of NADH with Neutral Red Functionalized Carbon Nanotube/Plasma-polymerized Film Composite Electrode

Hoshino

Muguruma

2012

Electrochemistry

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“…The most significant characteristic is a very wide linear range (59-5800 μM, r = 0.998) compared with the other NADH sensors based on SWCNTs, as shown in Table 1. (10)(11)(12)(15)(16)(17)21,30,31) At high concentrations (>3 mM), no current saturation was observed, unlike in conventional NADH sensors. This is attributed to the effective electrochemical communication provided by the electronically homogeneous s-SWCNTs.…”

Section: Nadh Sensingmentioning

confidence: 94%

“…One is the use of an electron transfer mediator. (10,12,15,16,29) The synergetic effect of SWCNTs and an electron transfer mediator can be used to realize a high-performance sensor. Although the use of such a mediator seems promising, the mediator still causes problems, such as leakage from the electrode surface, lack of long-term stability, and toxicity, which negatively affect its analytical applications.…”

Section: Nadh Sensingmentioning

confidence: 99%

“…Recently, there has been an increase in the number of reports of NADH sensing with SWCNTs because of their excellent electron transfer properties and catalytic activities. (10)(11)(12)(13)(14)(15)(16)(17)(18) In this article, the effect of electronically type-sorted SWCNTs on electrochemical performance is addressed and their analytical applications are examined. The investigation of the effectiveness of electrochemical sensors with electronically type-sorted SWCNTs is a challenging task because these chemical sensors work in aqueous media, unlike other electronic (3)(4)(5) and electrochemical (7) devices that work in the atmosphere.…”

Section: Introductionmentioning

confidence: 99%

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Electrochemical Behavior and Analytical Applications of Electronically Type-Sorted Carbon Nanotube Electrode

2016

Sensors and Materials

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Keywords: electronically type-sorted single-walled carbon nanotube, plasma-polymerized film, electrochemical sensor, nicotinamide adenine dinucleotideThe electrochemical behavior and analytical applications of an electrode with electronically typesorted (metallic and semiconducting) single-walled carbon nanotubes (SWCNTs) were examined. The effect of the electronic type of SWCNTs on the electrochemical behavior of nicotinamide adenine dinucleotide (NADH) as a model agent was investigated. The electrode configuration contained SWCNTs sandwiched between 3-5-nm-thick acetonitrile plasma-polymerized thin films. Cyclic voltammetry measurements demonstrated that the current due to the NADH oxidation of the electrode with semiconducting SWCNTs was much larger than that for electrodes with only metallic or unsorted SWCNTs. Electrochemical impedance spectroscopy measurements and atomic force microscopy observations suggested that the electrode with semiconducting SWCNTs formed a better electron transfer network than the electrodes with metallic or unsorted SWCNTs. Chronocoulometry measurements indicated that there was no distinct difference between the diffusion coefficients of NADH with the metallic and semiconducting SWCNT electrodes. Therefore, it was concluded that the semiconducting SWCNT electrode is more suitable than the metallic and unsorted SWCNT electrodes for electrochemical oxidation in terms of catalysis and electron transport. The semiconducting SWCNT electrode exhibited excellent performance for the sensing application of NADH detection with a significantly wide linear range of 59-5800 μM compared with that for conventional NADH sensors. Other significant performance characteristics are a sensitivity of 176 μA mM −1 cm −2 (defined as the slope of the current vs concentration plot at +0.4 V), a detection limit of 1.1 μM [signal-to-noise ratio (S/N) = 3], and a response time of 6 s.

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“…2,7,[8][9][10] Recently, carbon nanotubes were employed as a promising electrode material giving enhanced performances with less overpotentials and enhanced sensitivities. [11][12][13][14] The carbon nanotubes (CNTs) in the nanocomposite films show good charge transport properties resulting in less overpotentials and good stabilities.…”

Section: 6mentioning

confidence: 99%

Enhanced Electrocatalytic Activity for the NADH Oxidation with Oxidatively Treated Carbon Nanotubes Incorporated on a Redox Polymer Modified Electrode

Shin¹,

Shin²,

Kang³

2012

Bulletin of the Korean Chemical Society

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The electrochemical oxidation of dihydronicotinamide adenine dinucleotide (NADH) has drawn many attentions for use of its oxidized form (NAD + ) as an enzymatic cofactor in many dehydrogenase based biosensors and biofuel cells. 1,2At neutral pH, NADH/NAD + couple has a formal potential of −0.320 V (vs NHE), 3 but large oxidation overpotentials are generally required.2,4 In addition to this problem, direct oxidation of NADH shows unwanted side reactions or adsorption of the product. 5,6To avoid these problems, many studies using various electrocatalysts were reported. In this point of view, mediatormodified electrodes and electrochemical sensing designs were reviewed.1,2,7 The oxidation of NADH is known to follow an ECE mechanism with a rate-limiting step in the first electron transfer.2,6 Various redox mediators with quinone groups making two-electron and hydride transfer possible were reported as good candidates. 2,7,[8][9][10] Recently, carbon nanotubes were employed as a promising electrode material giving enhanced performances with less overpotentials and enhanced sensitivities.11-14 The carbon nanotubes (CNTs) in the nanocomposite films show good charge transport properties resulting in less overpotentials and good stabilities. 12,15In the present study, a redox polymer, the copolymer of polyacrylamide and poly(N-vinylimidazole) complexed with [Os(4,4'-dimethyl-2,2'-bipyridine), was employed for the electron transfer mediator for NADH oxidation. The redox polymers have been utilized for mediating electrons between the redox centers of enzymes and electrode surfaces.16,17 Some oxidase enzymes were "wired" to carbon electrodes and efficient electrocatalytic reactions such as glucose oxidation and O 2 reductions were reported. [16][17][18][19] At an electrode with a hydrogel film of the redox polymer, which is not a quinone-like mediator, catalytic electro-oxidation of NADH, but only a partial fraction, was measured. A composite film of the redox polymer and oxidatively treated single-walled carbon nanotubes (SWNTs) was applied on an edge plane graphite electrode surface. At this newly prepared electrode, an enhanced activity showing most NADH catalytically oxidized with less overpotential was achieved. As far as we know, the present redox polymer-CNT composite system, which is not a quinone type mediator, is first for the electrocatalytic NADH oxidation.Cyclic voltammograms obtained in a 2.0 mM NADH solution at bare EPG and RP/EPG electrodes for Figures 1(a) and 1(b), respectively, were shown. (For abbreviations of electrode types, consult the experimental section.) Voltammograms obtained in a pure supporting electrolyte were also shown as dashed curves. In Figure 1(a), only one oxidation wave for NADH oxidation was observed with a peak potential of 0.34 V. In Figure 1(b), in the absence of .

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Electrocatalytic oxidation of NADH with Meldola's blue functionalized carbon nanotubes electrodes

Cited by 94 publications

References 29 publications

Selective Detection of NADH with Neutral Red Functionalized Carbon Nanotube/Plasma-polymerized Film Composite Electrode

Selective Detection of NADH with Neutral Red Functionalized Carbon Nanotube/Plasma-polymerized Film Composite Electrode

Electrochemical Behavior and Analytical Applications of Electronically Type-Sorted Carbon Nanotube Electrode

Enhanced Electrocatalytic Activity for the NADH Oxidation with Oxidatively Treated Carbon Nanotubes Incorporated on a Redox Polymer Modified Electrode

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