Herein, the role of modified electrode comprised of polypyrrole (PPy), graphene oxide (GO), multi walled carbon nanotubes (MWCNTs) and copper (I) oxide nanoparticles in the electrochemical methanol oxida- tion is considered. The modified electrodes prepared through the successive Layer by Layer (LBL) electro- chemical and sonoelectrochemical deposition processes. As-fabricated electrodes were characterized by FT-IR spectroscopy and scanning electron microscopy (SEM), which confirmed the incorporation of GO into the PPy matrix. Afterward, the electrocatalytic performance of as-prepared electrodes was evaluated for methanol oxidation reaction by cyclic voltammetry (CV), chronoamperometry, and electrochemical impedance spectroscopy (EIS). It was found that the Pd sub-layer has a vital role in synthesis of Cu 2 O nanostrucures, because this noble nano-layer can protect the copper substrate and consequently lead to synthesis of Cu 2 O nanostrucures. CV measurements indicated that the simultaneous presence of GO with PPy and MWCNTs in the structure of electrode enhances the overall electrocatalytic performance of the LBL electrodes for methanol oxidation. So, a strong synergistic interaction is expected to be between these components. Moreover, the results from chronoamperometry confirmed that the modified electrode had a good stability and repeatability as electrocatalyst.
کلید واژگان :Polypyrrole Multi walled carbon nanotubes (MWCNTs) Graphene oxide (GO) Electrooxidation
ارزش ریالی : 600000 ریال
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