Comparison of Electrocatalytic Activity of poly(p-aminophenol) Film Supported Au-M (M= Pt, Cu and Ag) Bimetallic Nanoparticles for Oxidation of Sodium Borohydride

Ş. Karabi̇beroğlu, Z. Dursun
Ege University, TR

Keywords: borohydride, fuel cell, nanoparticles

Summary:

In this study, a poly (p-aminophenol) film (PPAP) and bimetallic nanoparticles modified polymer film electrodes (GCE), Au-Pt/PPAP/GCE, Au-Ag/PPAP/GCE, Au-Cu/PPAP/GCE were prepared by electrochemical techniques. The modified electrode surfaces were characterized using atomic force spectroscopy, scanning electron microscopy- energy-dispersive X-ray spectroscopy and electrochemical impedance spectroscopy techniques. The results showed that the existence of electrodeposited of bimetallic particles on the polymer film surfaces. The electrocatalytic activities of modified PPAP/GC and bulk electrodes were investigated for borohydride oxidation in alkaline media and response of electrodes were compared with each other from the corresponding voltammetric curves. There was no any oxidation reaction occurs on bare GCE, PPAP/GCE and Cu/PPAP/GCE in the presence of AB. Au-Pt bimetallic catalyst improved the catalytic activity of PPAP/GC electrode in terms of the manner of both peak potential and peak current.