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Journal of Nanotechnology
Volume 2012 (2012), Article ID 389505, 8 pages
http://dx.doi.org/10.1155/2012/389505
Research Article

Highly Stable and Active Pt/Nb-TiO2 Carbon-Free Electrocatalyst for Proton Exchange Membrane Fuel Cells

1General Motors Global Research and Development Center, Warren, MI 48090-9055, USA
2Department of Mechanical and Materials Engineering, The University of Western Ontario, London, ON, Canada N6A 5B9
3Institut National de la Recherche Scientifique-Énergie, Matériaux et Télécommunications, Université du Québec, Varennes, QC, Canada J3X 1S2

Received 13 March 2012; Accepted 30 May 2012

Academic Editor: Tanaji P. Gujar

Copyright © 2012 Shuhui Sun et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Supplementary Material

Figure S1 shows the XRD pattern of Nb -TiO2 sphere support after heat treatment at 1050°C under hydrogen. It was apparent that rutile phase TiO2 was dominant in the product. In addition, a lower oxidation state of titanium (Ti4O7) was also detected by XRD. This phase has been known as one of the most highly conductive and most stable TinO2n–1 compounds [1]. These phases could further improve the electrical conductivity for the TiO2, which is one of the important parameters for fuel cells.

  1. Supplementary Figure