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

H. Chhina^*
| S. Campbell
| O. Kesler

AFCC-Automotive Fuel Cell Cooperation Corp., 9000 Glenlyon Parkway, Burnaby, BC, Canada V5J 5J8

Department of Mechanical and Industrial Engineering, 5 King’s College Road, University of Toronto,

Toronto, Ontario, Canada, M5S 3G8

Corresponding Author Email:

harmeet.chhina@afcc-auto.com

Received:

January 29, 2009

| |

Accepted:

September 24, 2009

| | Citation

200-article_text-221-1-10-20131206.pdf

OPEN ACCESS

Abstract:

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 10Nb-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 H₂ at temperatures greater than 700°C. X-ray photoelectron spectroscopy (XPS) analysis was completed on 10Nb-TiO₂ calcined at 500°C and on 10Nb-TiO₂ calcined and then reduced at a range of temperatures (500°C to 900°C).

Keywords:

Catalyst support, oxidation, titania, tungsten doped titania, niobium doped titania, carbon, proton exchange membrane fuel cells, electrocatalyst

1. Introduction

2. Experimental Procedure

3. Results and Discussion

4. Conclusions

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