Berlin 2024 – scientific programme

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O: Fachverband Oberflächenphysik

O 32: Poster: Solid-Liquid Interfaces

O 32.8: Poster

Tuesday, March 19, 2024, 18:00–20:00, Poster C

Electrochemical Setup for High-Resolution Hydration Layer Mapping under Potential Control — •Antonia Köhler, Ralf Bechstein, and Angelika Kühnle — Physical Chemistry I, Bielefeld University, Germany

Electrochemical processes are of importance in a wide range of fields such as energy storage, sensors and electrocatalysis. However, many fundamental processes at the electrode-electrolyte interface are still poorly understood. It is widely known that the presence of an applied electric field has a significant influence on the structure at the interface, including the hydration structure. An ideal method for investigating the hydration structure at the molecular level is three-dimensional atomic force microscopy (3D-AFM). Here, we present 3D-AFM data unravelling the hydration structure at the Au(111) surface in the absence of an applied electric field. Furthermore, an electrochemical setup that allows for high-resolution hydration layer mapping under potential control is described. It is based on the 3D-AFM setup, additionally equipped with a three-electrode arrangement connected to a potentiostat. In future, this setup should be capable to map the electrode-electrolyte interface under potential control.

Keywords: Electrochemical Interfaces; Hydration Structures; 3D Atomic force microscopy