Pulse electrodeposited cathode catalyst layers for PEM fuel cells |
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| Authors: | A. Egetenmeyer I. Radev D. Durneata M. Baumgärtner V. Peinecke H. Natter R. Hempelmann |
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| Affiliation: | 1. Research Institute for Precious Metals and Metal Chemistry (fem), Katharinenstr. 17, 73525 Schwaebisch Gmünd, Germany;2. The Fuel Cell Research Center, Carl-Benz-Str. 201, 47057 Duisburg, Germany;3. Department of Physical Chemistry, Saarland University, Campus B2.2, 66123 Saarbruecken, Germany;4. Acad. Evgeni Budevski Institute of Electrochemistry and Energy Systems, Bulgarian Academy of Sciences, Acad. G. Bonchev str., bl. 10, 1113 Sofia, Bulgaria |
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| Abstract: | Nanostructured Pt and Pt3Co cathodes for proton exchange membrane fuel cells (PEMFCs) have been prepared by pulse electrodeposition. For high utilization the catalyst nanoparticles are directly deposited on the microporous layer (MPL) of a commercial available gas diffusion layer (GDL). In order to increase the hydrophilic nature of the substrate surface and thus improve drastically the electrodeposition process and the fuel cell performance, prior to electrodeposition, the carbon substrate is submitted to O2/Ar plasma activation. Cathodes with different amounts and distributions of Aquivion ionomer within the cathode catalyst layer (CCL) thickness (“homogeneous”, “gradient” and “anti-gradient”), different catalysts (Pt and Pt3Co) at varied plasma duration and catalyst loading have been prepared. The cathodes are analysed via attenuated total reflection (ATR-IR), goniometer, SEM, 0.5 M H2SO4 half-cell and 25 cm2 H2/Air single PEMFC. The highest single fuel cell performance is obtained for 2 min plasma activated Pt3Co cathode. |
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| Keywords: | PEMFC Plasma activation Pulsed electrodeposition Cathode catalyst layer Platinum Platinum–cobalt alloys |
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