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    Comparison of electrocatalytic activity of poly(p-aminophenol) Film Supported Au-M (M= Pt, Cu and Ag) bimetallic nanoparticles for oxidation of sodium borohydride
    (2013) Karabiberoglu S.; Dursun Z.
    A poly (p-aminophenol) film (PPAP) and bimetallic nanoparticles modified polymer film galssy carbon electrodes (GCE), Au-Pt/PPAP/GCE, Au-Ag/PPAP/GCE and Au-Cu/PPAP/GCE were prepared by electrochemical techniques. The modified electrode surfaces were characterized using scanning electron microscopy (SEM) and energy-dispersive X-ray spectroscopy (EDX). The electrocatalytic activities of modified PPAP/GC and bulk electrodes were investigated for borohydride oxidation in alkaline media and the response of electrodes were compared with each other from the corresponding voltammetric curves. There was no any oxidation take place on bare GCE, PPAP/GCE and Cu/PPAP/GCE in the presence of sodium borohydride. Au-Pt bimetallic modified PPAP/GGCE showed higher catalytic activity toward sodium borohydride in terms of the manner of both peak potential and peak current.
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    Electrochemical oxidation of ammonia borane on Au-Ag nanoparticles Modified Poly (p-aminophenol) film Glassy Carbon Electrode
    (2013) Karabiberoglu S.; Dursun Z.
    An Au-Ag nanoparticles modified poly(p-aminophenol) film electrode (Au-Ag/PPAP/GCE) was prepared by cyclic voltammetry. The electrochemical behaviour of ammonia borane (NH3BH3, AB) was studied in alkaline media at Au-Ag/PPAP/GCE. The surface morphology and chemistry were characterized by scanning electron microscopy (SEM), energy dispersive X-ray spectroscopy (EDX) and CV techniques. There was no any oxidation reaction occurs on bare GCE and PPAP/GCE in the presence of AB. Among the five electrodes which were Au disk, Ag/PPAP/GCE, Au/PPAP/GCE and Au-Ag/PAP/GCE. The comparative studies were revealed that Au-Ag/PPAP/GCE yield the best results due to the highest peak current and shifting the oxidation potential to more negative values for AB oxidation.