Mixed oxides for fuel cell electrodes
Abstract
Mixed oxides were studied in order to determine if such materials could act as oxygen-reducing electrocatalysts in an acid fuel cell. Choices were based upon producing variable valence and upon conferring stability at elevated temperatures in phosphoric acid. Barium ruthenate and the systems Ti-Ta-O, V-Nb-O, V-Ta-O, Ce-Ta-O were hot-acid stable. Potentiodynamic and galvanostatic studies are reported on materials from the Ti-Ta-O system, TiO2 as grown, TiO2 reduced with hydrogen, TiO2 with 0.1% Nb, lanthanum titanates with and without calcium or strontium, a tungsten bronze, barium ruthenate, and strontium titanate with .03% and with .15% Nb.
- Publication:
-
Final Report
- Pub Date:
- January 1976
- Bibcode:
- 1976nbs..reptR....B
- Keywords:
-
- Electrodes;
- Fuel Cells;
- Metal Oxides;
- Catalysts;
- Electrochemistry;
- Material Balance;
- Rare Earth Compounds;
- Stoichiometry;
- Transition Metals;
- Transport Properties;
- Energy Production and Conversion