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Exploration of bimetallic Pt-Pd/C nanoparticles as an electrocatalyst for oxygen reduction reaction |
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| Authors: | A. Maghsodi M.R. Milani Hoseini L. Samiee |
| Affiliation: | a Electrochemistry Research Center, Department of Analytical Chemistry, Faculty of Chemistry, Iran University of Science and Technology (IUST), Narmak, Farjam, Tehran, Iran b Renewable Energy Department, Energy Research Center, Research Institute of Petroleum Industry (RIPI), Tehran, Iran c Department of Chemistry, School of Basic Science, Yasouj University, Yasouj, Iran d Inhibitors Department, Materials Protection Division, Research Institute of Petroleum Industry (RIPI), Tehran, Iran |
| Abstract: | In this study, carbon supported Pt and Pt-Pd were synthesized as oxygen reduction reaction electrocatalysts for polymer electrolyte membrane fuel cells (PEMFCs). Pt and Pt-Pd nanoparticles have been synthesized by reduction of metal precursors in presence of NaBH4. Various techniques such as X-ray diffraction (XRD), energy dispersive X-ray analysis (EDX) and scanning electron microscopy (SEM) were utilized to study the prepared samples. Furthermore, electrochemical properties of the prepared samples were evaluated from cyclic voltammetry (CV), linear sweep voltammetry (LSV), chronoamperometry and electrochemical impedance spectroscopy (EIS). The results showed, the crystallite size of electrocatalysts (Pt and Pt-Pd) is below 10 nm. The higher catalytic activity was detected for Pt-Pd/C electrocatalyst for oxygen reduction reaction (ORR). In addition, it is believed that the better performance of electrocatalyst is related to the synergic effect between Pt and Pd nanoparticles, weakening of the O O bond on Pd-modified Pt nanoparticles in ORR, uniform dispersion of Pd and Pt on the carbon support and higher electrochemical active surface area (EAS) of Pt-Pd/C electrocatalyst. |
| Keywords: | Electrocatalyst Polymer electrolyte membrane fuel cell Oxygen reduction reaction (ORR) Nanoparticles |
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