Enhanced catalytic performance of Pt nanoparticles incorporated neodymium-cupper-iron mixed metal oxide nanoparticles on polyaniline-chitosan substrate as new catalyst for methanol electro-oxidation

In this research, Nd۲CuFe۲O۷ (NCuFO) nanoparticles were synthesized through the coprecipitation method and identified by energy dispersive X-ray (EDX), elemental distribution map, field emission scanning electron microscopy (FESEM), and transmission electron microscopy (TEM) analyses. Polyaniline (PANI) and chitosan (CHS) were used as effective and suitable substrates for nanoparticles. A novel Pt-NCuFO/PANI-CHS nanocatalyst was prepared by chemical reduction of hexachloroplatinic acid in the presence of NCuFO nanoparticles on the PANI-CHS substrate. The nanoparticles' distribution on the substrate was shown by TEM images. The catalytic performance of the Pt-NCuFO/PANI-CHS for methanol electro-oxidation was evaluated, compared to Pt/PANI-CHS. The effects of several experimental factors for methanol electro-oxidation were investigated. Pt-NCuFO/PANI-CHS catalyst showed better antipoisoning effect, higher electrochemically active surface area, and better stability towards methanol oxidation than Pt/PANI-CHS catalyst. The improved catalytic performance of Pt-NCuFO/PANI-CHS, compared to Pt/PANI-CHS suggests its promising application in direct methanol fuel cells.

کلیدواژه ها:

nanocatalyst ، Chitosan ، Polyaniline ، Methanol electro-oxidation