Nanotech 2010

Fuel cell catalysts based on core-shell nanoparticles

H. Xu, C. Zalitis, M. Rivera-Hernandez, T. Albrecht, A. Kucernak
Imperial College London, UK

Keywords: Pt nanoparticles, diepersion, STM

Abstract:

In this contribution, we focus on the different approaches to dispersing Pt and Co/Pt core/shell nanoparticles in solution and then depositing them on representative catalyst supports. These include gold or highly ordered pyrolytic graphite (HOPG) electrode surfaces. Specifically, we follow three different deposition protocols: A) solution deposition; B) directed solution deposition, and C) electrophoretic deposition of catalyst nanoparticles. Finally, we characterize the physicochemical properties of the catalysts surfaces by electrochemical methods (fuel cell testing) and electrochemical STM imaging.
 
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