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Active area determination for porous Pt-electrodes used in PEM fuel cells: Temperature and humidity effects
KTH, School of Chemical Science and Engineering (CHE), Chemical Engineering and Technology, Applied Electrochemistry.ORCID iD: 0000-0002-0452-0703
KTH, School of Chemical Science and Engineering (CHE), Chemical Engineering and Technology, Applied Electrochemistry.ORCID iD: 0000-0002-6019-6485
KTH, School of Chemical Science and Engineering (CHE), Chemical Engineering and Technology, Applied Electrochemistry.ORCID iD: 0000-0001-9203-9313
2009 (English)In: Proton Exchange Membrane Fuel Cells 9 / [ed] T. Fuller, C. Hartnig, V. Ramani, H. Uchida, H. Gasteiger, S. Cleghorn, P. Strasser, T. Zawodzinski, D. Jones, P. Shirvanian, T. Jarvi, P. Zelenay, C. Lamy, P. Bele, 2009, 1211-1220 p.Conference paper, Published paper (Refereed)
Abstract [en]

This paper aim to discuss a proper measure of the electrochemical active area of carbon supported Pt nanoparticle catalyst used in polymer electrolyte membrane (PEM) fuel cells. The cyclic voltammetric determination of hydrogen under potential deposition (Hupd) and carbon monoxide monolayer oxidation (CO stripping) performed in a fuel cell at fuel cell relevant conditions are compared and the influences of operation temperature (25-80 {degree sign}C) and relative humidity (RH) (40-90% RH) are discussed. The results show that both the shape and the charge of the Hupd are strongly dependent on operating conditions. However, for the CO stripping experiments only a negative shift in potential with increasing temperature or humidity was observed in accordance with results from aqueous electrolytes, whereas the charges for CO monolayer oxidation were almost constant for the temperatures investigated.

Place, publisher, year, edition, pages
2009. 1211-1220 p.
National Category
Other Chemical Engineering
Identifiers
URN: urn:nbn:se:kth:diva-91346DOI: 10.1149/1.3210676ISI: 000329585500123Scopus ID: 2-s2.0-77649269371OAI: oai:DiVA.org:kth-91346DiVA: diva2:509621
Conference
216 th ECS Meeting – Vienna, Austria 4-9 October 2009
Note

QC 20120417

Available from: 2012-03-13 Created: 2012-03-13 Last updated: 2014-10-06Bibliographically approved

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Lindström, RakelLindbergh, Göran

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