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O: Fachverband Oberflächenphysik

O 28: Solid-Liquid Interfaces II: Structure and Spectroscopy

O 28.9: Talk

Tuesday, March 19, 2024, 12:30–12:45, H 1012

Unraveling electrocatalysts and electrochemical interfaces in situ at the nanoscale — •Christopher Kley — Helmholtz Young Investigator Group Nanoscale Operando CO2 Photo-Electrocatalysis, Helmholtz-Zentrum Berlin für Materialien und Energie GmbH, 14109 Berlin, Germany — Department of Interface Science, Fritz Haber Institute of the Max Planck Society, 14195 Berlin, Germany

Recent advances in electrochemical atomic force microscopy will be presented, with a focus on deciphering the local properties of electrocatalysts under liquid phase reaction conditions. Reactions include the electroreduction of CO2 (CO2RR) and CO (COR), as well as the oxygen evolution reaction (OER). Selected results provide insights into (i) the complex surface structures of Cu electrodes during CO2RR and COR in distinct electrolytes, (ii) the electrical conductivity, chemical-frictional, and morphological properties of electrocatalysts, and (iii) the in situ surface structure and catalytic activity of OER catalysts. Complementary spectroscopic approaches and findings will be discussed and a perspective given on the potential of scanning probe microscopy for nanoscale catalysis and rational innovation of energy conversion materials.

Keywords: In situ Atomic Force Microscopy; Electrochemical Spectroscopy; CO2 Electroreduction; Oxygen Evolution Reaction