Effect of nitrogen configuration on carbon nanowall surface: Towards the improvement of electrochemical transduction properties and the stabilization of gold nanoparticles

A. Achour, S. Solaymani, S. Vizireanu, A. Baraket, A. Vesel, N. Zine, A. Errachid, G. Dinescu, J. J. Pireaux

Research output: Contribution to journalArticle

Abstract

In this work, unintentionally nitrogen doped carbon nanowall (CNW) films, deposited on silicon substrates, were treated in argon plasma admixed with nitrogen (Ar/N 2 ) or oxygen (Ar/O 2 ). X-ray photoelectron spectroscopy (XPS) showed that oxygen functional groups have been incorporated in various amounts with high nitrogen doping concentration (∼12.5–13.5 at%. for Ar/N 2 and Ar/O 2 gas mixtures). More importantly, nitrogen configuration on the surface has been modified after the treatment. The electrochemical reactivity of the CNW electrodes, before and after the treatment, was investigated by both cyclic voltammetry (CV) and electrochemical impedance spectroscopy. The CV results indicate that the pyrrolic nitrogen can play a key role in the electrochemical transaction improvement. In addition, deposition of gold (Au) nanoparticles (NPs) onto CNW samples and their interaction with CNWs has been discussed through XPS results. It was suggested that a certain nitrogen configuration there is a promotion of electron donation from nitrogen to the Au NPs. Such findings open the way to design nitrogen doped carbon materials with specific nitrogen configuration to improve electrochemical properties and to prepare better platform for Au NPs for use in catalysis and sensor applications.

Original languageEnglish
Pages (from-to)110-117
Number of pages8
JournalMaterials Chemistry and Physics
Volume228
DOIs
Publication statusPublished - 15 Apr 2019

Fingerprint

Gold
Nitrogen
Carbon
Stabilization
stabilization
gold
Nanoparticles
nitrogen
nanoparticles
carbon
configurations
Cyclic voltammetry
X ray photoelectron spectroscopy
photoelectron spectroscopy
Oxygen
Argon
Carbon films
argon plasma
promotion
oxygen

Keywords

  • Carbon nanowalls
  • Electrochemical transductor
  • Nitrogen doping
  • Plasma treatments
  • Pyrrolic nitrogen
  • Surface chemistry

Cite this

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title = "Effect of nitrogen configuration on carbon nanowall surface: Towards the improvement of electrochemical transduction properties and the stabilization of gold nanoparticles",
abstract = "In this work, unintentionally nitrogen doped carbon nanowall (CNW) films, deposited on silicon substrates, were treated in argon plasma admixed with nitrogen (Ar/N 2 ) or oxygen (Ar/O 2 ). X-ray photoelectron spectroscopy (XPS) showed that oxygen functional groups have been incorporated in various amounts with high nitrogen doping concentration (∼12.5–13.5 at{\%}. for Ar/N 2 and Ar/O 2 gas mixtures). More importantly, nitrogen configuration on the surface has been modified after the treatment. The electrochemical reactivity of the CNW electrodes, before and after the treatment, was investigated by both cyclic voltammetry (CV) and electrochemical impedance spectroscopy. The CV results indicate that the pyrrolic nitrogen can play a key role in the electrochemical transaction improvement. In addition, deposition of gold (Au) nanoparticles (NPs) onto CNW samples and their interaction with CNWs has been discussed through XPS results. It was suggested that a certain nitrogen configuration there is a promotion of electron donation from nitrogen to the Au NPs. Such findings open the way to design nitrogen doped carbon materials with specific nitrogen configuration to improve electrochemical properties and to prepare better platform for Au NPs for use in catalysis and sensor applications.",
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Effect of nitrogen configuration on carbon nanowall surface : Towards the improvement of electrochemical transduction properties and the stabilization of gold nanoparticles. / Achour, A.; Solaymani, S.; Vizireanu, S.; Baraket, A.; Vesel, A.; Zine, N.; Errachid, A.; Dinescu, G.; Pireaux, J. J.

In: Materials Chemistry and Physics , Vol. 228, 15.04.2019, p. 110-117.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Effect of nitrogen configuration on carbon nanowall surface

T2 - Towards the improvement of electrochemical transduction properties and the stabilization of gold nanoparticles

AU - Achour, A.

AU - Solaymani, S.

AU - Vizireanu, S.

AU - Baraket, A.

AU - Vesel, A.

AU - Zine, N.

AU - Errachid, A.

AU - Dinescu, G.

AU - Pireaux, J. J.

PY - 2019/4/15

Y1 - 2019/4/15

N2 - In this work, unintentionally nitrogen doped carbon nanowall (CNW) films, deposited on silicon substrates, were treated in argon plasma admixed with nitrogen (Ar/N 2 ) or oxygen (Ar/O 2 ). X-ray photoelectron spectroscopy (XPS) showed that oxygen functional groups have been incorporated in various amounts with high nitrogen doping concentration (∼12.5–13.5 at%. for Ar/N 2 and Ar/O 2 gas mixtures). More importantly, nitrogen configuration on the surface has been modified after the treatment. The electrochemical reactivity of the CNW electrodes, before and after the treatment, was investigated by both cyclic voltammetry (CV) and electrochemical impedance spectroscopy. The CV results indicate that the pyrrolic nitrogen can play a key role in the electrochemical transaction improvement. In addition, deposition of gold (Au) nanoparticles (NPs) onto CNW samples and their interaction with CNWs has been discussed through XPS results. It was suggested that a certain nitrogen configuration there is a promotion of electron donation from nitrogen to the Au NPs. Such findings open the way to design nitrogen doped carbon materials with specific nitrogen configuration to improve electrochemical properties and to prepare better platform for Au NPs for use in catalysis and sensor applications.

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