Treatment of reticulated vitreous carbon by dielectric barrier discharge plasma for electrodes production

Leide Lili Gonçalves Da Silva, Luiz Gustavo Ferreira, Alberto Lima Santos, Edson Cocchieri Botelho, A. Tóth, Konstantin G. Kostov

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

This paper deals with the surface modification of reticulated vitreous carbon (RVC) by dielectric barrier discharge (DBD) for electrodes production. RVC samples were exposed to air-DBD plasma for 5.0 and 10.0 min. Following the treatment, the specimens were characterized by scanning electron microscopy (SEM), Raman spectroscopy, X-ray photoelectron spectroscopy (XPS), contact angle measurements, and electrochemical analyses [cyclic voltammetry (CV)]. The SEM images show an alteration of the RVC surface morphology because of the surface etching during the DBD processing. This finding is in agreement with the enhanced specific electrochemical surface area of RVC electrodes, which is related to an increase of its surface roughness. In addition, a slight increase of the oxygen content on the surface was confirmed by XPS analysis. Therefore, the RVC surface became more hydrophilic as detected by water contact angle measurements. For corroborating this statement, a solid monolithic vitreous carbon was used for this test. An increase in the anodic charge of the RVC electrodes due to the surface oxidation was also observed. Raman spectra showed insignificant changes in the material crystalline structure.

Original languageEnglish
Article number6587566
Pages (from-to)3207-3213
Number of pages7
JournalIEEE Transactions on Plasma Science
Volume41
Issue number12
DOIs
Publication statusPublished - Dec 2013

Fingerprint

plasma jets
electrodes
carbon
photoelectron spectroscopy
scanning electron microscopy
surface roughness
x rays
Raman spectroscopy
etching
Raman spectra
oxidation
air
oxygen
water

Keywords

  • Atmospheric plasma treatment
  • Dielectric barrier discharge (DBD)
  • Electrodes
  • Reticulated vitreous carbon (RVC)

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Nuclear and High Energy Physics

Cite this

Treatment of reticulated vitreous carbon by dielectric barrier discharge plasma for electrodes production. / Da Silva, Leide Lili Gonçalves; Ferreira, Luiz Gustavo; Santos, Alberto Lima; Botelho, Edson Cocchieri; Tóth, A.; Kostov, Konstantin G.

In: IEEE Transactions on Plasma Science, Vol. 41, No. 12, 6587566, 12.2013, p. 3207-3213.

Research output: Contribution to journalArticle

Da Silva, Leide Lili Gonçalves ; Ferreira, Luiz Gustavo ; Santos, Alberto Lima ; Botelho, Edson Cocchieri ; Tóth, A. ; Kostov, Konstantin G. / Treatment of reticulated vitreous carbon by dielectric barrier discharge plasma for electrodes production. In: IEEE Transactions on Plasma Science. 2013 ; Vol. 41, No. 12. pp. 3207-3213.
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