Electrochemically induced surface modifications of boron-doped diamond electrodes: An X-ray photoelectron spectroscopy study

Christiaan H. Goeting, Frank Marken, Aurora Gutiérrez-Sosa, Richard G. Compton, John S. Foord

Research output: Contribution to journalConference articlepeer-review

155 Citations (Scopus)

Abstract

The activity of diamond electrodes depends on the chemical state of the diamond surface, and the present work is focussed on understanding how chemical changes either produced in situ electrochemically, or by ex situ plasma treatments, influence the electrochemical properties. Conductive boron-doped diamond electrodes were produced by depositing adherent boron-doped diamond films on tungsten substrates using a hot filament reactor and were characterised by Raman spectroscopy, scanning electron microscopy (SEM), high-resolution X-ray photoelectron spectroscopy (XPS) and electrochemical methods. In order to produce electrochemically induced surface modifications, anodic and cathodic polarisation experiments were performed in an aqueous 0.2 M phosphate buffer solution (pH = 2). The surface composition of the electrode, as determined by ex situ high-resolution XPS measurements, could be linked to the electrochemical performance of diamond film electrodes. The extent to which changes in surface composition and electrode performance can be controlled and reversed by suitable plasma treatments is explored. (C) 2000 Elsevier Science S.A. All rights reserved.

Original languageEnglish
Pages (from-to)390-396
Number of pages7
JournalDiamond and Related Materials
Volume9
Issue number3-6
DOIs
Publication statusPublished - 1 Apr 2000
Event10th European Conference on Diamond, Diamond-like Materials, Carbon Nanotubes, Nitrides and Silicon Carbide - Prague, Czech Republic
Duration: 12 Sep 199917 Sep 1999

Keywords

  • CVD diamond
  • Electrochemical treatment
  • Surface modification
  • XPS

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Chemistry(all)
  • Mechanical Engineering
  • Materials Chemistry
  • Electrical and Electronic Engineering

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