Electrochimica Acta, Vol.55, No.27, 8013-8017, 2010
Niobium-doped titanium oxide for fuel cell application
High surface area niobium-doped titanium oxide catalyst supports were synthesized through a chemical method using nano-sized polystyrene (PS) latex as a template By varying the concentration of template with respect to mania and niobium precursors we were able to produce niobium-doped titanium oxides with surface areas of 75-115 m(2)/g and sufficient electrical conductance to function as fuel cell catalyst supports The oxides were subsequently platinized and evaluated as oxygen reduction catalysts using a rotating disk electrode One of the samples showed a mass activity of 0 16 A/mg(pt) and a specific activity of 170 mu A/cm(pt)(2) at 900 mV which are comparable to our benchmark Pt/C electrocatalyst (C) 2010 Elsevier Ltd All rights reserved