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Oxygen reduction on Pd3Pt1 bimetallic nanoparticles highly loaded on different carbon supports

Paper ID Volume ID Publish Year Pages File Format Full-Text
47316 46467 2010 7 PDF Available
Title
Oxygen reduction on Pd3Pt1 bimetallic nanoparticles highly loaded on different carbon supports
Abstract

The development of new cost-effective cathode catalysts with high methanol tolerance and at a high catalyst loading is highly desirable for the direct methanol fuel cell. The Pd3Pt1 bimetallic alloy nanoparticles highly loaded on different carbon supports, including Vulcan XC-72R carbon, single and multi-walled carbon nanotubes (SWCNTs/MWCNTs) and ordered mesoporous carbon (OMC), have been prepared by a modified polyol reduction route. The activities of the catalysts for the oxygen reduction reaction (ORR) have been studied based on the rotating disk and ring-disk electrode (RDE/RRDE) techniques in pure and methanol-containing electrolytes. X-ray diffraction indicates that all the Pd3Pt1/C nanoparticles evidence a single-phase fcc disordered structure. The mean particle size of Pd3Pt1 alloy nanoparticles on different supports is ca. 4–5 nm even at a metal loading of 50 wt%. Among various carbons supported catalysts, the highest ORR activity, found on the OMC-supported Pd3Pt1 catalyst, even surpasses that on the commercial Pt/C catalyst. Kinetic analysis reveals that the ORR on the Pd3Pt1/OMC catalyst predominantly undergoes a four-electron process, leading to water formation. Furthermore, the Pd3Pt1/OMC catalyst exhibited a higher methanol tolerance during the ORR than the commercial Pt/C catalyst; ensuring a higher ORR performance while diminishing Pt utilization.

Keywords
Pd–Pt alloy; Carbon nanotube; Ordered mesoporous carbon; Electrocatalysis; Oxygen reduction reaction; Methanol tolerance
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Oxygen reduction on Pd3Pt1 bimetallic nanoparticles highly loaded on different carbon supports
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis B: Environmental - Volume 97, Issues 3–4, 18 June 2010, Pages 347–353
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