Miniature H2/O2 fuel cells using TiO2 nanotube substrates and sputtered Pt catalyst

Woo Jin Lee, Dong Ha Lim, W. H. Smyrl

Research output: Contribution to journalArticlepeer-review

6 Scopus citations


Modified designs for a miniature H2/air fuel cell are described using Pt sputtered on titanium oxide nanotube (Pt/TONT) as a catalyst at low mass loadings. Titanium microgrids or Ti evaporated onto a silicon substrate with holes at the center were used as substrates that were then anodized in fluoride-containing electrolytes to form the TONT arrays. Self-organized tubes grew as anodizing time increased, resulting in the highly enhanced surface area for electrochemical reactions. High cathodic current on cyclic voltammogram of Pt/TONT catalyst indicated high catalytic activity for the oxygen reduction reaction (ORR). The miniature fuel cells were successful, and showed high power densities up to 9.64 mW cm-2 at potentials from 0.7 V to 0.2 V.

Original languageEnglish (US)
Pages (from-to)612-617
Number of pages6
JournalJournal of Power Sources
StatePublished - 2013

Bibliographical note

Funding Information:
This research was supported by the Initiative for Renewable Energy and the Environment of the University of Minnesota, project no. LG-MC3-2005 and by the collaborative project funded by King Abdulaziz City for Science and Technology, Riyadh, Saudi Arabia.


  • Electrochemical anodization methods
  • Miniature fuel cell
  • Oxygen reduction reaction
  • Titanium oxide nanotube


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