Potentiodynamic Electrochemical Impedance Spectroscopy of Silver on Platinum in Underpotential and Overpotential Deposition

TL;DR

This study uses PDEIS to analyze silver deposition on platinum, revealing surface changes and high stability of silver monolayers, demonstrating PDEIS as an effective tool for monitoring wet surface chemistry.

Contribution

It introduces the application of PDEIS for real-time analysis of silver deposition on platinum, highlighting surface dynamics and stability insights.

Findings

Intrinsic platinum surface changes affect deposition irreversibility

Silver monolayer on platinum exhibits high stability

PDEIS effectively monitors wet surface chemistry processes

Abstract

Simultaneous monitoring of ac and dc responses of the electrode-electrolyte interface with potentiodynamic electrochemical impedance spectroscopy (PDEIS) in silver underpotential and overpotential deposition on platinum has confirmed the role of intrinsic Pt surface changes in the irreversibility of Ag underpotential deposition and disclosed exceptionally high stability of Ag monolayer on Pt. PDEIS has been demonstrated to be a convenient means for wet surface chemistry monitoring.