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O: Fachverband Oberflächenphysik

O 18: Solid-Liquid Interfaces I: Structure and Spectroscopy

O 18.1: Talk

Monday, March 18, 2024, 15:00–15:15, H 1012

Reporting activity and stability for the oxygen evolution reaction — •Marcel Risch — Helmholtz-Zentrum Berlin, Berlin, Germany

The oxygen evolution reaction (OER) is a key enabler of sustainable chemical energy storage. It occurs on the anode of a fuel-producing device such as electrolyzers or photoelectrochemical cells and provides the protonated ions for the formation of the fuel molecule. The OER has been studied for more than 230 years. Yet, there is no consensus how to report the key performance parameters of electrocatalytic activity and stability [1,2], which thwarts, e.g., correlating these parameters to materials properties for systematic mechanistic insight [3]. The author assesses the current sore spots when reporting activity and stability and touches on the related topic of determining the electrochemical surface area [4]. Ideas are presented to improve upon the current sore spots.

[1] M. Risch, Commun Chem 6, 221 (2023) [2] M. Risch, Cur. Op. Electrochem. 38, 101247 (2023) [3] D. Antipin, M. Risch, JPhys Energy 2, 032003 (2020) [4] D.M. Morales, M. Risch, JPhys Energy 3, 034013 (2021)

Keywords: Electrocatalysis; Oxygen Evolution Reaction; Electrochemical Education; Activity; Stability