Reactive dissolution of nitrogen dioxide in aqueous 15NO2-: the first experimental determination of a main-group electron-exchange rate in solution

Stanbury, David M.; DeMaine, M. M.; Goodloe, G. W.

doi:10.1021/ja00196a083

Cited by 41 publications

(13 citation statements)

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“…A comparison of the CVs with and without nitrite in the solution indicates that in a pH 5.0 phosphate buffer the reduction of nitrite starts at ca. À0.63 V, with a reduction peak at about À0.77 V, which is due to the reduction of NO that derives from the disproportionation of nitrite [33,34]. Hence, the catalase films decreased the overpotential of NO reduction by at least 0.23 V. A mechanism for the catalytic process that is reported in the literature is the following [15,23]:…”

Section: Electrocatalysis Using Cat At a Modified Gce For Oxygen Hydmentioning

confidence: 97%

Direct electrochemistry and electrocatalysis of catalase immobilized on a SWNT-nanocomposite film

Jiang

Yang

Akins

2008

Journal of Electroanalytical Chemistry

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Section: Electrocatalysis Using Cat At a Modified Gce For Oxygen Hydmentioning

confidence: 97%

Direct electrochemistry and electrocatalysis of catalase immobilized on a SWNT-nanocomposite film

Jiang

Yang

Akins

2008

Journal of Electroanalytical Chemistry

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“…5 In addition, it is known that the disproportionation of NO 2 2 into nitrate (NO 3 2 ) and NO is strongly pH-dependent with significant concentrations of NO and NO 3 2 present in acidic environment. 6 Sensitive sensing of NO 2 2 and NO by a single detection system is an unrevealed problem in analytical chemistry. Conventional glassy carbon electrode (GCE), Pt and Hg electrodes suffer from overpotential (h) problem, not to mention the lack of dual catalytic properties.…”

Section: Introductionmentioning

confidence: 99%

A dual electrochemical sensor for nitrite and nitric oxide

Zen

Kumar

Wang

2000

Analyst

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Nafion/lead-ruthenate pyrochlore chemically modified electrode (NPyCME) showed a remarkable dual sensing activity toward NO2- oxidation and NO reduction as demonstrated by cyclic voltammetry (CV), ac-impedance spectroscopy and flow injection analysis (FIA). The mechanistic parameters of current function, charge transfer resistance and exchange current for the NPyCME, GCE and Nafion-coated GCE were evaluated and compared. The disproportionation reaction of NIIIO2- into NIVO3- + NIIO in acidic solution was used as a model system for testing the dual sensing ability of the NPyCME. The obtained crossover peak response for NO2- oxidation and NO reduction in pH 1.65 buffer solution gave the direct proof for the applicability of the NPyCME in the dual electrocatalytic action. By flow injection analysis, under optimized conditions, the calibration curve was linear in the range of 100 nM-100 microM and 800 nM-63.3 microM and the detection limit (S/N = 3) was 4.8 nM and 15.6 nM for NO2- and NO, respectively.

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“…71 This model relies, in part, on the concept of self-exchange reactions, and the inference that self-exchange reactions can be defined for radicals. For many years, it was simply 72,73 Factors recognized to influence the reaction rate constants include the structural rearrangements of the radical, the reaction driving force, the selfexchange rate constant of the reaction partner, the reaction electrostatics, and the size disparity between the reactants. On the other hand, some of these reactions are too fast to comply with Marcus theory and are inferred to have reduced kinetic barriers arising from an inner-sphere type of mechanism in which the radical orbitals overlap with those of the reaction partners (strong overlap).…”

Section: Electron Transfermentioning

confidence: 99%