Synthesis of supported Pt alloy 3D rhombus shape nanoparticles for oxygen reduction reaction
Publish place: Iranian Journal of Hydrogen & Fuel، Vol: 2، Issue: 2
Publish Year: 1394
نوع سند: مقاله ژورنالی
زبان: English
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شناسه ملی سند علمی:
JR_IJHFC-2-2_006
تاریخ نمایه سازی: 21 فروردین 1397
Abstract:
In this study PtFeCo ternary alloy nanoparticles of three dimensional (3D) rhombus shapes dispersed on graphene nanosheets (PtFeCo/Gr) were successfully prepared and studied as electrocatalysts for the oxygen reduction reaction (ORR) in polymer-electrolyte fuel cells. A combination of analytical techniques including powder X-ray diffraction, X-ray photoelectron spectra, inductively coupled plasma-atomic emission spectrometry, scanning electron microscopy and electrochemical methods have been used for characterization of the synthesized electrocatalysts in this study. For comparison the graphene supported PtFe catalyst (PtFe/Gr), graphene supported PtCo catalyst (PtCo/Gr) binary alloys and graphene supported Pt catalyst (Pt/Gr) were also synthesized and investigated under thesame experimental conditions. From the electrochemical analysis, it was found that PtFeCo/Gr particles exhibited an obvious enhancement of ORR activity in comparison with pure Pt and binary alloys. The significantly improved EAS, ORR activity and cell performance is achieved by increasing the utilization of the PtCoFe/ Gr electrocatalyst by increasing the three-phase boundary in the electrocatalyst layer
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Authors
Elaheh Lohrasbi
Department of Chemistry, Amirkabir University of Technology, Tehran, Iran
Mehran Javanbakht
Department of Chemistry, Amirkabir University of Technology, Tehran, Iran Fuel and Solar cell Lab, Renewable Energy Research Center, Amirkabir University of Technology, Tehran, Iran
Sayed Ahmad Mozaffari
Department of Chemical Technologies, Iranian Research Organization for Science and Technology (IROST), Tehran, Iran