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Tungsten carbide on directly grown multiwalled carbon nanotube as a co-catalyst for methanol oxidation

Title
Tungsten carbide on directly grown multiwalled carbon nanotube as a co-catalyst for methanol oxidation
Authors
Rahsepar, M[Rahsepar, Mansour]Pakshir, M[Pakshir, Mahmoud]Nikolaev, P[Nikolaev, Pavel]Safavi, A[Safavi, Afsaneh]Palanisamy, K[Palanisamy, Kowsalya]Kim, H[Kim, Hasuck]
DGIST Authors
Kim, H[Kim, Hasuck]
Issue Date
2012-10-30
Citation
Applied Catalysis B: Environmental, 127, 265-272
Type
Article
Article Type
Article
Keywords
Carbon NanotubesCarbonizationCatalyst MaterialCatalyst PerformanceCatalyst PoisoningCocatalystCVD ProcessElectrical ContactsElectrocatalystsElectrocatalytic PerformanceElectrochemical MeasurementsElectrodeposition TechniqueElectron MicroscopyFuel Cell Electrocatalysts, Methanol OxidationGraphite RodHydrogenMethanolMethanol OxidationMultiwalled Carbon Nanotubes (MWCN)OxidationPhotoelectronsPlatinumPlatinum Nano-ParticlesSpatial ConfigurationThree ElectrodeTungstenTungsten CarbideX Ray Photoelectron Spectroscopy
ISSN
0926-3373
Abstract
Multiwalled carbon nanotubes (MWCNT) were grown directly on the surface of graphite rod by using CVD process and then modified with tungsten carbide by carbothermal hydrogen carbonization technique. Then, platinum nanoparticles were deposited on the MWCNTs by means of electrodeposition technique. Catalyst materials were characterized by electron microscopy, X-ray photoelectron spectroscopy and three electrode electrochemical measurements. Catalysts supported on the directly grown MWCNTs exhibit notably better electrocatalytic performance towards methanol oxidation compared to the commercial Pt/C catalyst. Modification of MWCNTs with tungsten carbide was shown to further increase the catalyst performance. It is believed that the superior performance of catalysts prepared on the MWCNTs as catalyst support results mostly from the superior electrical contact and unique spatial configuration of the directly grown MWCNTs, while the positive effect of the tungsten carbide co-catalyst is mostly attributed to its improved resistance towards poisoning with the reaction intermediates produced during the methanol oxidation. © 2012 Elsevier B.V.
URI
http://hdl.handle.net/20.500.11750/2456
DOI
10.1016/j.apcatb.2012.08.032
Publisher
Elsevier B.V.
Files:
There are no files associated with this item.
Collection:
Energy Science and EngineeringETC1. Journal Articles


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