The electrochemical study of different supported and unsupported Pt-based catalysts used in polymer electrolyte fuel cells (PEMFCs) has been made by means of thin film rotating disk electrode (RDE) method. The comparison of electrochemical surface area (ESA) was made using cyclic voltammetry measurements in or at room temperature and scanning rates of 20 and . Oxygen reduction activity for aerogel-supported and carbon-supported Pt catalysts was evaluated at various rotation speeds in the range of and compared to the catalytic activity of unsupported Pt-black catalyst. The calculated values of Levich constant for the oxygen reduction reaction (ORR) indicate dependence on the applied voltage and either 4 or 2–4 electron transfer mechanism. The hydrogen peroxide by-product formation was determined with a rotating ring disk electrode (RRDE) and was observed to take place mostly at voltages below due to the limitations from mass transport effects. The results obtained at different Pt loadings in the range of Pt demonstrated that XC-72 and aerogel-based catalysts are foreseen to have higher ESA in comparison to other tested supported and unsupported commercially available catalysts.
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November 2006
This article was originally published in
Journal of Fuel Cell Science and Technology
Research Papers
Rotating Disk Electrode Study of Supported and Unsupported Catalysts for PEMFC Application
F. Dundar,
F. Dundar
Connecticut Global Fuel Cell Center,
UCONN
, 44 Weaver Road, Storrs, CT 06269-5233
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A. Smirnova,
A. Smirnova
Connecticut Global Fuel Cell Center,
UCONN
, 44 Weaver Road, Storrs, CT 06269-5233
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X. Dong,
X. Dong
Aerogel Composite, LLC c/o ICA, Inc.
, 102-R Filley Street, Unit H, Bloomfield CT 06002-1853
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A. Ata,
A. Ata
Gebze Institute of Technology
, Istanbul Caddesi, 101 Gebze Kocaeli, 41400, Turkey
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N. Sammes
N. Sammes
Connecticut Global Fuel Cell Center,
UCONN
, 44 Weaver Road, Storrs, CT 06269-5233
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F. Dundar
Connecticut Global Fuel Cell Center,
UCONN
, 44 Weaver Road, Storrs, CT 06269-5233
A. Smirnova
Connecticut Global Fuel Cell Center,
UCONN
, 44 Weaver Road, Storrs, CT 06269-5233
X. Dong
Aerogel Composite, LLC c/o ICA, Inc.
, 102-R Filley Street, Unit H, Bloomfield CT 06002-1853
A. Ata
Gebze Institute of Technology
, Istanbul Caddesi, 101 Gebze Kocaeli, 41400, Turkey
N. Sammes
Connecticut Global Fuel Cell Center,
UCONN
, 44 Weaver Road, Storrs, CT 06269-5233J. Fuel Cell Sci. Technol. Nov 2006, 3(4): 428-433 (6 pages)
Published Online: May 3, 2006
Article history
Received:
December 5, 2005
Revised:
May 3, 2006
Citation
Dundar, F., Smirnova, A., Dong, X., Ata, A., and Sammes, N. (May 3, 2006). "Rotating Disk Electrode Study of Supported and Unsupported Catalysts for PEMFC Application." ASME. J. Fuel Cell Sci. Technol. November 2006; 3(4): 428–433. https://doi.org/10.1115/1.2349524
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