The Electrocatalytic Activity of Au Electrodes Changes Significantly in Various Na⁺/K⁺ Supporting Electrolyte Mixtures.

ABSTRACT: The potential of maximum entropy (PME) is an indicator of extreme disorder at the electrode/electrolyte interface and can predict changes in catalytic activity within electrolytes of varying compositions. The laser-induced current transient technique is employed to evaluate the PME for Au polycrystalline (Au_pc) electrodes immersed in Ar-saturated cation electrolyte mixtures containing potassium and sodium ions at pH = 8. Five cation ratios (0.5 M K₂SO₄:0.5 M Na₂SO₄ = 0:1, 0.25:0.75, 0.5:0.5, 0.75:0.25, and 1:0) are explored, considering earlier studies that unveil cation-dependent shifts at near-neutral pH. Moreover, for all electrolyte compositions, electrochemical impedance spectroscopy is utilized to determine the double-layer capac

SUBMITTER: Sarpey TK 

PROVIDER: S-EPMC11934990 | biostudies-literature | 2024 Jul

REPOSITORIES: biostudies-literature