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

Figure 1

SEM (a) and TEM (c) images pristine hollow Nb-TiO₂ nanostructures. SEM (b) and TEM (d) images Pt nanoparticles deposited on hollow Nb-TiO₂ nanostructures.

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