The Crucial Role of Rotation Speed on the Determination of Tafel Slopes of Electrocatalysts in Rotating Disk Electrode Experiments.

ABSTRACT: This article highlights the crucial influence of rotation speeds in determining the Tafel slopes of electrocatalysts in rotating disk electrode (RDE) experiments. As an exemplary system, we investigate catalytically active nickel oxide/oxyhydroxide films that were generated from the transformation of electrodeposited nickel selenide at Au-RDEs, under oxygen evolution reaction (OER) conditions in alkaline electrolytes at three different rotation rates (1600, 2500, and 4000 rpm). Tafel slopes were extracted using cyclic voltammetry (CV) and chronoamperometry (CA). Our results underline the benefit of higher rotation speed in overcoming undesired mass transport limitations. Additionally, we point out that using CA instead of CV methods is preferable for the extraction of kinetic parameters si

SUBMITTER: Hiege F 

PROVIDER: S-EPMC12498423 | biostudies-literature | 2025 Oct

REPOSITORIES: biostudies-literature