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O: Fachverband Oberflächenphysik

O 29: Key Note III

O 29.1: Plenary Talk

Tuesday, March 2, 2021, 10:00–10:30, Audimax

Electrochemistry of platinum: new views on an old problem — •Marc Koper — Leiden University, Leiden, The Netherlands

Platinum is the most used electrocatalyst in electrochemical energy conversion devices such as fuel cells and electrolysers. In this talk I will highlight the recent work of my group on understanding the surface chemistry of platinum in an aqueous electrolyte, by combining single-crystal electrochemistry, density functional theory calculations, ultra-high-vacuum modeling, in situ spectroscopy and in situ electrochemical scanning tunneling microscopy. I will challenge some existing explanations and interpretations of platinum electrochemistry, and show the sometimes surprising surface disordering of platinum that happens at both positive (anodic) and negative (cathodic) potentials.