Reversible Hydrogen Electrode (RHE) Scale Dependent Surface Pourbaix Diagram at Different pH.

ABSTRACT: In the analysis of electrocatalysis mechanisms and the design of catalysts, the effect of electrochemistry-induced surface coverage is a critical consideration that should not be overlooked. The surface Pourbaix diagram emerges as a fundamental tool in this context, providing essential insights into the surface coverage of adsorbates generated via electrochemical potential-driven water activation. A classic surface Pourbaix diagram considers the pH effects by correcting the free energy of H⁺ ions by the concentration-dependent term: -k_BT ln(10) × pH, which is independent of the reversible hydrogen electrode (RHE) scale. However, this is sometimes inconsistent with the experimentally observed potential-dependent surface coverage at an RHE scale, especiall

SUBMITTER: Liu H 

PROVIDER: S-EPMC11008240 | biostudies-literature | 2024 Apr

REPOSITORIES: biostudies-literature