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Title: Voltammetric and impedance behaviours of surface-treated nano-crystalline diamond film electrodes

The electrochemical performances of hydrogen- and oxygen-terminated nano-crystalline diamond film electrodes were investigated by cyclic voltammetry and AC impedance spectroscopy. In addition, the surface morphologies, phase structures, and chemical states of the two diamond films were analysed by scanning probe microscopy, Raman spectroscopy, and X-ray photoelectron spectroscopy, respectively. The results indicated that the potential window is narrower for the hydrogen-terminated nano-crystalline diamond film than for the oxygen-terminated one. The diamond film resistance and capacitance of oxygen-terminated diamond film are much larger than those of the hydrogen-terminated diamond film, and the polarization resistances and double-layer capacitance corresponding to oxygen-terminated diamond film are both one order of magnitude larger than those corresponding to the hydrogen-terminated diamond film. The electrochemical behaviours of the two diamond film electrodes are discussed.
Authors:
; ; ; ;  [1]
  1. College of Mechanical and Electric Engineering, North China University of Technology, Beijing (China)
Publication Date:
OSTI Identifier:
22488513
Resource Type:
Journal Article
Resource Relation:
Journal Name: AIP Advances; Journal Volume: 5; Journal Issue: 4; Other Information: (c) 2014 Author(s); Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; CHEMICAL STATE; DIAMONDS; ELECTROCHEMISTRY; ELECTRODES; FILMS; HYDROGEN; MICROSCOPY; NANOSTRUCTURES; OXYGEN; POLARIZATION; POLAROGRAPHY; RAMAN SPECTROSCOPY; SURFACES; VOLTAMETRY; X-RAY PHOTOELECTRON SPECTROSCOPY