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Platinum-decorated chemically modified reduced graphene oxide-multiwalled carbon nanotube sandwich composite as cathode catalyst for a proton exchange membrane fuel cell
Published in Royal Society of Chemistry
2014
Volume: 4
   
Issue: 50
Pages: 26140 - 26148
Abstract
Graphite oxide (GO) was chemically altered using polyethylene glycol (PEG) to produce functionalized GO (f-GO). An ensemble of reduced f-GO sheets and multiwalled carbon nanotubes (MWNTs), referred to as few-layer graphene-MWNT sandwiches (GCSs), were synthesized by a catalysis-assisted chemical vapor deposition (CCVD) method and explored as the electrocatalyst support material for oxygen reduction reaction (ORR) in a proton exchange membrane fuel cell (PEMFC). Platinum nanoparticles were decorated on the carbon supports by a modified glycol reduction technique. As-prepared electrocatalysts were characterized by Raman spectroscopy, X-ray diffraction and transmission electron microscopy. Electrocatalytic performance was evaluated by cyclic voltammetry and PEMFC fuel cell measurements and compared with a commercially available Pt/C electrocatalyst. The Pt/GCS electrocatalyst gave a maximum PEMFC performance of 495 mW cm-2 at 60°C temperature. The improvement in the ORR activity was ascribed to the uniform dispersion of Pt nanoparticles with an optimal particle size (∼3.5 nm) over a well-organized conducting catalyst support. © 2014 the Partner Organisations.
About the journal
JournalData powered by TypesetRSC Advances
PublisherData powered by TypesetRoyal Society of Chemistry
ISSN20462069
Open AccessNo
Concepts (18)
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    Chemical vapor deposition
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    Cyclic voltammetry
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    Electrocatalysts
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    Electrolytic reduction
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    Graphene
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    Multiwalled carbon nanotubes (mwcn)
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    Platinum
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    Transmission electron microscopy
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    X ray diffraction
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    ELECTROCATALYST SUPPORT
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    Electrocatalytic performance
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    OPTIMAL PARTICLE SIZES
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    Oxygen reduction reaction
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    Platinum nano-particles
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    Polyethylene glycol (peg)
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    PT/C ELECTROCATALYSTS
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    REDUCTION TECHNIQUES
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    Proton exchange membrane fuel cells (pemfc)