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Preparation and characterization of Pt on modified multi-wall carbon nanotubes to be used as electrocatalysts for high temperature fuel cell applications

Paper ID Volume ID Publish Year Pages File Format Full-Text
46914 46453 2011 11 PDF Available
Title
Preparation and characterization of Pt on modified multi-wall carbon nanotubes to be used as electrocatalysts for high temperature fuel cell applications
Abstract

A new approach towards the development of electrocatalytic layers for use in high temperature polymer electrolyte membrane fuel cells (PEMFCs) is reported. Modified carbon nanotubes were used as the support. The aim was to achieve a uniform distribution of polar groups, which can interact with phosphoric acid, on the surface of the modified carbon support. Multi-wall carbon nanotubes were selected due to their unique properties regarding electronic conductivity and specific surface area. They were surface modified introducing pyridine based groups on the side walls which are known to interact with phosphoric acid. The different supports were thoroughly characterized by means of relevant techniques such as Raman and XPS. Platinum was deposited on the new carbon supports resulting in the newly synthesized catalysts, which were also thoroughly characterized by means of XRD, EDX, TEM and H2 Chemisorption. Stable and finely distributed Pt catalysts with nanoparticles size ranging between 2 and 4 nm were obtained using the chemically modified nanotubes as supports. Measurements of the catalytic activity towards oxygen reduction were also performed in order to evaluate the potential use of these materials as catalytic layers in PEMFCs.

Graphical abstractFigure optionsDownload full-size imageDownload as PowerPoint slideHighlights► Towards the development of catalytic layers with increased catalyst utilization. ► Introduction of pyridine groups on MWCNTs by surface covalent functionalization. ► Optimization of Pt deposition by reduction of its salt in ethylene glycol solution. ► Uniformly dispersed Pt catalysts with particle size in the range of 2.5–4 nm.

Keywords
PEM fuel cell; Catalyst utilization; MWCNT functionalization; Pt deposition; Oxygen reduction reaction
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Preparation and characterization of Pt on modified multi-wall carbon nanotubes to be used as electrocatalysts for high temperature fuel cell applications
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis B: Environmental - Volume 106, Issues 3–4, 11 August 2011, Pages 379–389
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