Chemistry Letters, Vol.37, No.8, 838-839, 2008
Niobium oxides as cathode electrocatalysts for platinum-free polymer electrolyte fuel cells
Niobium oxides are shown to exhibit oxygen reduction reaction (ORR) activity with high onset potential (ca. 0.85 V vs. NHE) comparable to that for Pt-based catalysts along with excellent stability under acidic conditions.