New materials are needed to replace carbon black as the cathode support in proton exchange membrane fuel cells. Tin(IV) oxide and titanium(IV) oxide were chosen as host materials due to their low cost, acid resistance, and non-toxicity. SnO2 and TiO2 were doped with molybdenum, niobium, tungsten, tantalum and iron, with substitutions of 5�40%, to form new compounds that maintain the rutile structure of the host material. The new compounds, both singly- and multiply-doped, were synthesized by grinding together powders in the correct stoichiometric ratios followed by heating to 950�1100 �C for 6 days in sealed quartz tubes. The resulting powders were characterized using single-crystal X-ray diffraction, X-ray fluorescence, resistivity tests and powder X-ray diffraction.

Synthesis and characterization of transition metal doped SnO<sub>2</sub> and TiO<sub>2</sub>

245th National Meeting (2013)

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Synthesis and characterization of transition metal doped SnO2 and TiO2

Synthesis and characterization of transition metal doped SnO₂ and TiO₂