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Dresden 2017 – scientific programme

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MM: Fachverband Metall- und Materialphysik

MM 34: Poster session II

MM 34.32: Poster

Tuesday, March 21, 2017, 18:30–20:30, P4

Potential-strain coupling on electrocatalysis of nanoporous platinum — •Xinyan Wu1, Shan Shi1,2, Anastasia Straßer1, Matthias Graf1, and Jörg Weissmüller1,21Institut für Werkstoffphysik und -technologie, Technische Universität Hamburg-Harburg, Hamburg — 2Institut für Werkstoffforschung, Werkstoffmechanik, Helmholtz-Zentrum Geesthacht, Geesthacht

Nanoporous platinum derived from dealloying shows excellent electrocatalytic activity such as methanol electrooxidation due to their extremely high specific surface area. Elastic deformation is known to strongly impact many chemical reaction processes. So it is of great interest to detect and quantify the coupling of catalysis reaction to strain in nanoporous platinum. Here we fabricated nanoporous platinum thin films by dealloying cosputtered Pt-based alloys. Then we explored the influences of elastic strain on the methanol electrooxidation process (reaction potential, rate and efficiency, etc.) via dynamic electro-chemo-mechanical analysis (DECMA).

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