The effect of functionalised multi-walled carbon nanotubes in the hydrogen electrooxidation reaction in reactive currents impurified with CO

The present article investigates the tolerant effect exerted by a functionalised multi-walled carbon nanotube (MWCNT) support compared with the Vulcan XC-72 support for a nanoparticulate Pt catalyst. The negative effect produced in the hydrogen oxidation reaction (HOR) by the presence of a Pt contam...

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Bibliographic Details
Published in:International journal of hydrogen energy 2014-03, Vol.39 (10), p.5063-5073
Main Authors: ESCUDERO-CID, R, VARELA, A. S, HERNANDEZ-FERNANDEZ, P, FATAS, E, OCON, P
Format: Article
Language:English
Subjects:
Alternative fuels. Production and utilization
Applied sciences
Carbon monoxide
Catalysts
Electrochemical impedance spectroscopy
Electrodes
Energy
Exact sciences and technology
Fuels
Hydrogen
Multi wall carbon nanotubes
Nanostructure
Platinum
Poisoning
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Summary:The present article investigates the tolerant effect exerted by a functionalised multi-walled carbon nanotube (MWCNT) support compared with the Vulcan XC-72 support for a nanoparticulate Pt catalyst. The negative effect produced in the hydrogen oxidation reaction (HOR) by the presence of a Pt contaminated with high CO coverage was analysed. This investigation was conducted using a rotating disk electrode (RDE) and a single cell with membrane electrode assemblies (MEAs) with loads of 0.3 mg Pt/cm super(2) for the anode and 0.6 mg Pt/cm super(2) for the cathode at various poisoning times. To this end, polarisation curves were performed, and electrochemical impedance spectroscopy (EIS) measurements were analysed. In addition, the recovery of the poisoning/de-poisoning process was studied. The -OH groups anchored to the MWCNT support exert a protective effect on the Pt nanoparticles, making the catalyst more efficient in a PEMFC fed with H sub(2) + CO.
ISSN:0360-3199
1879-3487
DOI:10.1016/j.ijhydene.2014.01.083