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

Khammarnia, Somaye; Saffari, Jilla; Ekrami-Kakhki, Mehri-Saddat

doi:10.22034/crl.2025.512011.1558

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

Document Type : Research Article

Authors

Somaye Khammarnia ¹

Jilla Saffari ²

Mehri-Saddat Ekrami-Kakhki ³

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

² Department of Chemistry, Zahedan Branch, Islamic Azad University, P.O. Box 98135-978, Zahedan, Iran

³ Department of Chemical Engineering, Esfarayen University of Technology, Esfarayen, North Khorasan, Iran

https://doi.org/10.22034/crl.2025.512011.1558

Abstract

In this research, Nd2CuFe2O7 (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.

Graphical Abstract