Dresden 2017 – wissenschaftliches Programm
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MM: Fachverband Metall- und Materialphysik
MM 34: Poster session II
MM 34.32: Poster
Dienstag, 21. März 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 Weissmüller1,2 — 1Institut 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).