Chloride ion-induced large scale reconstruction on an electrochemically roughened Ag electrode

Publisher Website
Google Scholar
Abstract
We have studied changes in the surface morphology of an electrochemically roughened polycrystalline silver electrode at −0.20 V vs SCE in 0.1 M KCl using cyclic voltammetry, scanning electron microscopy (SEM) and scanning tunneling microscopy (STM). STM observations on a scale ranging from micrometer down to nanometer were made in air at atmospheric pressure and room temperature. Cyclic voltammograms for the roughened electrode in 0.1 M KCl before and after the relaxation treatment show that the current decreases in the double layer potential range. SEM images of the roughened Ag after the relaxation reveal the collapse and the coalescence of the nodules on the electrode surface compared to the surface morphology at the initial stage. These findings are consistent with STM results obtained from a large-scale observation. STM can resolve the fine structure of a nodule surface on the roughened electrode. This structure is observed to relax.

This publication has 0 references indexed in Scilit: