Charge transfer mechanisms underlying Contact Glow Discharge Electrolysis

Yerokhin, Aleksey; Mukaeva, V. R.; Парфенов, Е.В.; Laugel, Nicolas; Matthews, A.

doi:10.1016/j.electacta.2019.04.152

Cited by 45 publications

(38 citation statements)

References 75 publications

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“…The occurrence of the formation of the latter event depends on the operating conditions of the cell and the polarity of the electrode. The CGDE phenomenon can occur during the electrolysis of aqueous solutions with high conductivity, non-aqueous electrolytes or melts [4,7]. In the present work, we considered prevalently aqueous electrolytes.…”

Section: Introductionmentioning

confidence: 99%

Contact Glow Discharge Electrolysis: Effect of Electrolyte Conductivity on Discharge Voltage

et al. 2020

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Contact glow discharge electrolysis (CGDE) can be exploited in environmental chemistry for the degradation of pollutants in wastewater. This study focuses on the employment of cheap materials (e.g., steel and tungsten) as electrodes for experiments of CGDE conducted in electrochemical cells with variable electrolytic composition. A clear correlation between breakdown voltage (VB)/discharge (or midpoint) voltage (VD) and the conductivity of the electrolyte is shown. Regardless of the chemical nature of the ionogenic species (acid, base or salt), the higher the conductivity of the solution, the lower the applied potential required for the onset of the glow discharge. Concerning practical application, these salts could be added to poorly conductive wastewaters to increase their conductivity and thus reduce the ignition potential necessary for the development of the CGDE. Such an effect could render the process of chemical waste disposal from wastewaters more economical. Moreover, it is evidenced that both VB and VD are practically independent on the ratio anode area to cathode area if highly conductive solutions are employed.

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Section: Introductionmentioning

confidence: 99%

Contact Glow Discharge Electrolysis: Effect of Electrolyte Conductivity on Discharge Voltage

et al. 2020

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“…We do observe a slight increase in chromium concentration at the surface Post-PALMS (Table 5). Corroborating this result, a very superficial dealloying was shown to occur upon EPPo of another chromium steel [14], with a chromium rich surface layer of approximately 10nm in thickness formed. The surface enrichment in chromium (which is likely to be due to its lower susceptibility to electrodissolution compared to iron) could provide a source of the slight increase in surface hardness observed here.…”

Section: Changes In Mechanical Propertiesmentioning

confidence: 55%

“…Also, additional complexities arise in the challenge of smoothing the ALM surfaces, with as yet poorly understood surface science and much research still to be addressed. This study focuses on the Plasma Additive Layer Manufacturing Smoothing (PALMS) technology, an innovative bespoke designed process derived from electrolytic plasma polishing (EPPo) [10][11][12][13][14]. The method is applied on the treating of one of the most commonly ALM printed materials, AISI 316 stainless steel.…”

Section: Introductionmentioning

confidence: 99%

Plasma additive layer manufacture smoothing (PALMS) technology – An industrial prototype machine development and a comparative study on both additive manufactured and conventional machined AISI 316 stainless steel

Yang

Laugel

Housden

et al. 2020

Additive Manufacturing

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“…The gas ionization rate and plasma generation rate are just suitable for semiconductor surface softening in this region. We call this region the micro arc plasma discharge region, which is different from glow discharge [31] and arc discharge [32]. The oxidation potential of hydroxyl radical is 2.8 eV, which means a strong oxidation property, but it is very unstable.…”

Section: The Mechanism Of Plasma Electrolytic Processing and Mechanical Polishingmentioning

confidence: 99%

Combination of Plasma Electrolytic Processing and Mechanical Polishing for Single-Crystal 4H-SiC

et al. 2021

Micromachines

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Single-crystal 4H-SiC is a typical third-generation semiconductor power-device material because of its excellent electronic and thermal properties. A novel polishing technique that combines plasma electrolytic processing and mechanical polishing (PEP-MP) was proposed in order to polish single-crystal 4H-SiC surfaces effectively. In the PEP-MP process, the single-crystal 4H-SiC surface is modified into a soft oxide layer, which is mainly made of SiO2 and a small amount of silicon oxycarbide by plasma electrolytic processing. Then, the modified oxide layer is easily removed by soft abrasives such as CeO2, whose hardness is much lower than that of single-crystal 4H-SiC. Finally a scratch-free and damage-free surface can be obtained. The hardness of the single-crystal 4H-SiC surface is greatly decreased from 2891.03 to 72.61 HV after plasma electrolytic processing. By scanning electron microscopy (SEM) and X-ray Photoelectron Spectroscopy (XPS) observation, the plasma electrolytic processing behaviors of single-crystal 4H-SiC are investigated. The scanning white light interferometer (SWLI) images of 4H-SiC surface processed by PEP-MP for 30 s shows that an ultra-smooth surface is obtained and the surface roughness decreased from Sz 607 nm, Ra 64.5 nm to Sz 60.1 nm, Ra 8.1 nm and the material removal rate (MRR) of PEP-MP is about 21.8 μm/h.

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Charge transfer mechanisms underlying Contact Glow Discharge Electrolysis

Cited by 45 publications

References 75 publications

Contact Glow Discharge Electrolysis: Effect of Electrolyte Conductivity on Discharge Voltage

Contact Glow Discharge Electrolysis: Effect of Electrolyte Conductivity on Discharge Voltage

Plasma additive layer manufacture smoothing (PALMS) technology – An industrial prototype machine development and a comparative study on both additive manufactured and conventional machined AISI 316 stainless steel

Combination of Plasma Electrolytic Processing and Mechanical Polishing for Single-Crystal 4H-SiC

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