Modification of electrochemically roughened Au(111) by underpotentially deposited silver and its effect on the subsequent electrodeposition of polypyrrole

作者：Liu YC^*

来源：Langmuir, 2003, 19(17): 6888-6893.

DOI：10.1021/la0344276

In this study, electrochemically roughened Au(111) is modified with underpotential deposition (UPD) silver for the first time. The formation of self-assembled monolayers of pyrrole monomers and subsequently further autopolymerization are found on the UPD-Ag-modified gold surfaces. The presence of UPD Ag improves the stability of polypyrrole (PPy) monolayers against desorption in a sonicating bath at elevated temperature. Furthermore, the nucleation and growth mechanism for PPy electropolymerized on UPD-Ag-modified Au is distinguishable from that on unmodified Au. The corresponding conductivity and the Raman intensity of PPy electropolymerized on UPD-Ag-modified Au increase by about 2-fold and 4-fold, respectively.

• 出版日期2003-8-19