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High PEMFC performance by applying Ir-V nanoparticles as a cathode catalyst

Paper ID Volume ID Publish Year Pages File Format Full-Text
47727 46481 2009 6 PDF Available
Title
High PEMFC performance by applying Ir-V nanoparticles as a cathode catalyst
Abstract

Very active catalysts Ir-V/C, as a novel suitable cathode catalyst in PEMFCs was synthesized using IrCl3 and NH4VO3 as the Ir and V precursors. By applying the ethylene glycol (EG) method, a well dispersion of Ir-V/C catalysts with mean particle size of 2 nm was obtained. The membrane–electrode assembly (MEA) fabricated with Ir-V nanoparticles exhibited the excellent catalytic activity toward the oxygen reduction reaction (ORR) and, reached 517 mW cm−2 at 0.43 V and 210 mW cm−2 at 0.30 V in a real fuel cell environment, H2/O2 and H2/air, respectively. In particular, promising results were obtained based on a low metal (Ir) loading of 0.4 mg cm−2 on the cathode which achieved 100 h durability at a constant current density of 1200 mA cm−2. The electrocatalytic effect related to a change in the electro-catalyst structure was discussed based on the XRD and TEM data. Also, for the first time, the electrochemical impedance spectra (EIS) and cyclic voltammetry (CV) techniques were used to assess the kinetics of oxygen reduction on the produced samples and the enhancement effect of V in-situ of fuel cells.

Keywords
Ir-based catalyst; Polyol process; Oxygen reduction reaction; Cathode; In-situ EIS and CV technique; PEMFC
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis B: Environmental - Volume 91, Issues 1–2, 7 September 2009, Pages 198–203
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us