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O: Fachverband Oberflächenphysik

O 97: Solid-liquid interfaces: Reactions and electrochemistry III

O 97.3: Vortrag

Freitag, 13. März 2026, 10:15–10:30, TRE/PHYS

How to Best Achieve a Steady State: Comparison of Different Methods to Acquire Tafel Plots — •Maren-Kathrin Heubach and Gregory Jerkiewicz — Department of Chemistry, Queen's University, Kingston, Canada.

The performance of an electrocatalyst is typically characterized by Tafel plots, which show a natural logarithm of the current density of a reaction as a function of the overpotential. Hereby, the exchange current density and the Tafel slope can be determined, giving insights into the mechanism of the electrocatalytic reaction. Even though Tafel plots are widely used, there is a large variety in performing the measurements to create Tafel plots.

In this contribution, we will discuss and compare several approaches to achieve the closest approximation to the desired steady state. These approaches will be showcased with the benchmark system of a polycrystalline Pt sample in an aqueous sulphuric acid solution.

Keywords: electrochemistry; electrocatalysis; Tafel plots; HER; Pt