کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1281275 | 1497499 | 2014 | 11 صفحه PDF | دانلود رایگان |
• Pt nanoparticles supported on Functionalized MWCNT were prepared by polyol method.
• The behaviour of the Pt–MWCNT as a CO tolerant catalyst for PEMFC has been studied.
• Pt–MWCNT as anode of the PEMFC shows better performance than Pt–Vu at CO presence.
• Pt–MWCNT is a promising catalyst material in H2 + CO low temperatures PEMFC.
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/cm2 for the anode and 0.6 mg Pt/cm2 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 H2 + CO.
Journal: International Journal of Hydrogen Energy - Volume 39, Issue 10, 26 March 2014, Pages 5063–5073