Characterization of Nb and W Doped Titania as Catalyst Supports for Proton Exchange Membrane Fuel Cells

被引：0
|
作者：
Chhina, H. [1 ,2 ]
Campbell, S. [1 ]
Kesler, O. [2 ]
机构：
[1] AFCC Automot Fuel Cell Cooperat Corp, Burnaby, BC V5J 5J8, Canada
[2] Univ Toronto, Dept Mech & Ind Engn, Toronto, ON M5S 3G8, Canada
来源：
JOURNAL OF NEW MATERIALS FOR ELECTROCHEMICAL SYSTEMS | 2009年 / 12卷 / 04期
关键词：
Catalyst support; oxidation; titania; tungsten doped titania; niobium doped titania; carbon; proton exchange membrane fuel cells; electrocatalyst; LOW-TEMPERATURE SYNTHESIS; THIN-FILMS; ELECTRICAL-PROPERTIES; MESOPOROUS TITANIA; TIO2; STABILITY; ELECTROCATALYST; MECHANISM; CORROSION; CRYSTAL;
D O I：
暂无
中图分类号：
O646 [电化学、电解、磁化学];
学科分类号：
081704 ;
摘要：
Niobium doped titania and tungsten doped titania prepared using a sol-gel technique were evaluated as possible catalyst support materials for proton exchange membrane fuel cells. The electrical conductivity of the doped materials prepared under different heat-treatment temperatures and partial oxygen pressures was measured Rutile 10Nb-TiO2 was extremely conductive compared to the anatase 10M-TiO2. For the W doped samples the conductivity was found to be extremely low compared to the rutile 10Nb-TiO2, and W segregation was observed when the material was reduced in H-2 at temperatures greater than 700 degrees C. X-ray photoelectron spectroscopy (XPS) analysis was completed on 10Nb-TiO2 calcined at 500 degrees C and on 10Nb-TiO2 calcined and then reduced at a range of temperatures (500 degrees C to 900 degrees C).
引用
收藏
页码：177 / 185
页数：9
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