Electrochemical redox potential in flame plasma

Caruana, Daren J.; McCormack, Sean

doi:10.1016/s1388-2481(02)00445-9

Cited by 20 publications

(10 citation statements)

References 13 publications

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“…Hickling Vennekamp, and Ogumi outlined the use of non-thermal plasma as an electrolyte for metal surface oxidation [1][2][3][4][5][6]. Our work extended this idea by using a flame plasma as an electrolyte to support redox reactions at an electrode surface probed using voltammetry [7][8][9][10][11].…”

Section: Introductionmentioning

confidence: 92%

Modulation of copper(I) oxide reduction/oxidation in atmospheric pressure plasma jet

Sener

Caruana

2018

Electrochemistry Communications

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We describe the controlled reduction of copper(I) oxide films to metallic copper in a nonthermal, atmospheric pressure, helium plasma jet. Thin layers (≈ 0.1 m) of Cu2O are electrochemically deposited onto Pt electrodes and placed in capacitively coupled helium plasma doped with H2, O2 and CH4 gases. Ex-situ Raman spectroscopy was used to probe the effect of plasma treatment on the deposited copper oxide layer. We show that application of a static bias voltage to the Pt substrate during plasma exposure can control the rate of reduction of the copper(I) oxide film. We propose that the reduction process is mediated by plasma electrons and controlling the electron flux to the surface can be used as a means to modulate the reduction process.

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Section: Introductionmentioning

confidence: 92%

Modulation of copper(I) oxide reduction/oxidation in atmospheric pressure plasma jet

Sener

Caruana

2018

Electrochemistry Communications

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“…ion concentration in the two compartments. The linear relationship revealed proves the significant contribution of diffusion potential to the overall potential measured 22 . On the other hand, the trends for the Pt and graphite electrodes do not coincide, since the interfacial potentials of these materials with the flame plasma are expected to be different 23 .…”

Section: Electrochemistry In Flames 315mentioning

confidence: 57%

Electrochemistry in Flames

2010

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Flames and combustion science are well established fields having contributed to the foundations of engineering and chemistry and led to remarkable achievements in our ‘industrial age’. The aim of this paper, however, is to highlight the electrochemical properties of flames, which are known to a lesser extent. First a historical account on the study on flames is given, followed by a general discussion on the formation and properties of common flames. The core of the discussion deals with the presence of charged species in flames, or else their plasma nature. It is this property that allows us to treat flames as conductive media and even develop flame electrochemical systems that yield voltages in the same fashion as standard batteries. Due to their very interesting plasma properties, therefore, flames can be incorporated with already developed electrochemical methodologies and generate new research areas of great potential.

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“…14,15 We show that with appropriate experimental design, electrochemical methodology can be applied to study gaseous plasma systems. Our work 16,17 and the work of Goodings 18 have demonstrated that such studies are possible.…”

Section: Introductionmentioning

confidence: 62%

Plasma electrochemistry: potential measured at boron doped diamond and platinum in gaseous electrolyte

Hadzifejzovic

Galiani

Caruana

2006

Phys. Chem. Chem. Phys.

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Premixed hydrogen/oxygen flame doped with ionisable alkali metals was considered as a dilute electrolyte. Two identical premixed flames which were in physical contact, served as a two compartment flame electrolyte cell. Five different electrochemical cells were studied, each containing a different combination of three alkali metals, Li, K and Cs. Pairs of boron doped diamond (BDD) and platinum electrodes were used to measure the overall zero current cell potential. The total potential measured across the cell was shown to be the sum of the mixed potential, dependent on the identity of ionised species present in the flame, and the diffusion potential originating at the junction between the two flames. Classical kinetic molecular theory and electrochemical theory of mixed potentials have been applied to account for the potential difference measured across these gas phase electrochemical cells. The relative merits of both models are discussed in the context of the experimental results obtained.

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Electrochemical redox potential in flame plasma

Cited by 20 publications

References 13 publications

Modulation of copper(I) oxide reduction/oxidation in atmospheric pressure plasma jet

Modulation of copper(I) oxide reduction/oxidation in atmospheric pressure plasma jet

Electrochemistry in Flames

Plasma electrochemistry: potential measured at boron doped diamond and platinum in gaseous electrolyte

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