2024 : 11 : 1
Ali Bahari

Ali Bahari

Academic rank: Professor
ORCID:
Education: PhD.
ScopusId:
HIndex:
Faculty: Science
Address:
Phone: 9112537702

Research

Title
Improved oxygen reduction reaction in PEMFCs by functionalized CNTs supported Pt–M (M = Fe, Ni, Fe–Ni) bi- and tri-metallic nanoparticles as efficient electrocatalyst
Type
JournalPaper
Keywords
Carbon nanotube; Functionalization Catalytic support; Electrocatalyst; Oxygen reduction reaction; PEM fuel Cell
Year
2020
Journal INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
DOI
Researchers Hajar Rajae ، Ali Bahari ، Maliheh Pashai Gatabi

Abstract

In this work, Functionalized Carbon nanotubes (FCNTs) supported hybrid catalysts including Pt, Fe and Ni nanoparticles were prepared and further used as an electrocatalytic electrode for Proton Exchange Membrane Fuel Cell (PEMFC) cathode. In this regard, various ratios of nitric acid/sulfuric acid were tested for functionalization of CNTs. The ethylene glycol reduction method was applied to deposit the hybrid electrocatalyst nanoparticles on FCNTs. It was revealed that the combination of FCNTs, as the support catalyst, with hybrid platinum and transition metals, accelerated the oxygen reduction reaction (ORR) by passing through the four-electron pathway which was due to the high crystallinity and aspect ratio, low defect density and unique electrical conductivity of CNTs and Pt-transition metals alloys. As a result, the power density profoundly enhanced (up to 237%) while the charge transfer resistance reduced, compared to Pt–C 10%wt commercial catalyst. This study demonstrated the excellent performance of FCNTs decorated Pt–Ni–Fe electrocatalyst can be considered as a good candidate for the future of the catalyst layer in PEMFC.