Impact of accompanying hydrogen generation on metal nanotube electrodeposition

Munekazu Motoyama, Yasuhiro Fukunaka, Yukio H. Ogata, Friedrich B. Prinz

Research output: Contribution to journalArticlepeer-review

16 Citations (Scopus)


Ni is electrodeposited into polycarbonate porous membrane templates at various cathodic potentials and bulk solution pH values. The membrane pore diameters are 200 nm. Transmission electron microscope observations reveal that the electrodeposited Ni nanostructures are nanowires but occasionally nanotubes. The nanotube wall thicknesses vary from 10 to 70 nm. Nanotubes with thinner walls are deposited under more acidic and less noble conditions. The numerical model for pH values at the cathode surface in the template is developed. Calculated pH values at the cathode surface are lower in the template than those at a vertical planar cathode. The current efficiency of Ni is measured by inductively coupled plasma emission spectrometry. As the predicted by the pH calculations, the current efficiency of Ni is lower for a porous template than for a vertical planar cathode. The observed nanotube walls become thinner as the current efficiency decreases. Thus, it is deduced that accompanying H 2 evolutions promote nanotube growth in the pores. Finally, the pH values in the template are more than 1 to 2 times smaller than at the vertical planar cathode surface.

Original languageEnglish
Pages (from-to)D357-D369
JournalJournal of the Electrochemical Society
Issue number6
Publication statusPublished - 2010
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Renewable Energy, Sustainability and the Environment
  • Surfaces, Coatings and Films
  • Electrochemistry
  • Materials Chemistry


Dive into the research topics of 'Impact of accompanying hydrogen generation on metal nanotube electrodeposition'. Together they form a unique fingerprint.

Cite this