Enhanced Catalytic Performance of Pt-La2CuFe2O7/Polyaniline-Chitosan Nanocomposites for Methanol Electro-Oxidation

Document Type : Research Paper


1 Chemistry Department, Payame Noor University, Tehran 19395-4697, Iran

2 Esfarayen University of Technology, Esfarayen, North Khorasan, Iran

3 Chemistry Department, Payame Noor University, 19395-4697, Tehran, Iran

4 Department of Chemistry, Zahedan Branch, Islamic Azad University, P.O. Box 98135-978, Zahedan, Iran



In this research, the La2CuFe2O7 (LCuFO) nano-composites were synthesized by adopting the coprecipitation method. The La2CuFe2O7 nano-composites were identified via transmission electron microscopy (TEM), Fourier infrared spectroscopy (FTIR), X-ray powder diffraction (XRD), and vibrating-sample magnetometer (VSM). Polyaniline and chitosan (PANI-CHS) were employed as an effective and suitable substrate for these nano-composites. The Pt-LCuFO/PANI-CHS nano-composite was prepared by the chemical reduction of hexachloroplatinic acid by sodium tetrahydroborate in the presence of LCuFO nano-composite on the PANI-CHS support and it was characterized by performing XRD as well as TEM. Electrochemical impedance spectroscopy (EIS), chronoamperometry (CA), and cyclic voltammetry (CV) of the catalytic performance of the Pt-LCuFO/PANI-CHS nano-composite were determined for carrying out the electrooxidation of methanol via the CO stripping voltammetry. Also, the durability of the Pt-LCuFO/ PANI-CHS nanocatalyst as well as the effect of multiple factors, including methanol concentration, temperature, and scanning speed were investigated for the electrooxidation of methanol. The increased catalytic performance of Pt-LCuFO/PANI-CHS nano-catalyst in comparison with the Pt/PANI-CHS suggests its application for the electrooxidation of methanol in direct methanol fuel cells.