Nanostructured TiO₂ Doped with Nb as a Novel Support for PEMFC

Figure 3

X-ray diffractograms of the Pt-supported catalysts together with their respective transmission electron diffraction patterns: (a) Pt/TiO₂-Nb; (b) Pt/C. Note: reflections contributed by the sample holder, made of aluminum, are denoted in all XRD patterns with a star above its corresponding peaks (JCPDS 04-0787).