Impedance study of adsorption phenomena on three-dimensional nano-nickel electrode deposited on silicon microchannel plate

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review

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Author(s)

  • S. H. XU
  • M. LI
  • Y. P. ZHU
  • L. W. WANG
  • P. X. YANG

Detail(s)

Original languageEnglish
Pages (from-to)165 - 171
Journal / PublicationElectrochimica Acta
Volume132
Publication statusPublished - 20 Jun 2014

Abstract

Three-dimensional nano-nickel electrodes fabricated on silicon microchannel plates by electroless deposition are characterized by electrochemical impedance spectroscopy. Compared to the nickel sheet, adsorption of cations and anions is detected due to the larger surface area of the porous nickel structure and three-dimensional architecture of the silicon microchannel plates. Adsorption is sensitive to the frequency and increasing step of the external voltage and different desorption rates of 0.003 and 0.027 A/cm2 are observed from cations and anions, respectively. The experimental results indicate that adsorption is responsible for the anomalous increase of the impedance in the low frequency region. © 2014 Elsevier Ltd.

Research Area(s)

  • Adsorption phenomena, Impedance spectroscopy, Silicon microchannel plates, Three-dimensional nano-nickel electrode

Citation Format(s)