Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
7740192 | Journal of Power Sources | 2013 | 6 Pages |
Abstract
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 9.64Â mWÂ cmâ2 at potentials from 0.7Â V to 0.2Â V.
Related Topics
Physical Sciences and Engineering
Chemistry
Electrochemistry
Authors
Woo-Jin Lee, Dong-Ha Lim, W.H. Smyrl,