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Behavior of hydrogen atom at Nafion-Pt interface |
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| Authors: | Muneyuki Tsuda Hideaki Kasai |
| Institution: | a Department of Applied Physics, Osaka University, Suita, Osaka 565-0871, Japan b Department of Physics, Osaka University, Toyonaka, Osaka 560-0043, Japan c Center for the Promotion of Research on Nanoscience and Nanotechnology, Osaka University, Toyonaka, Osaka 560-8531, Japan d Physics Department, De La Salle University, Taft Ave., Manila 1004, Philippines |
| Abstract: | We present a mechanism depicting how a hydrogen atom migrates from a platinum catalyst to a Nafion membrane using ab initio calculations based on density functional theory (DFT). The H atom initially adsorbed on Pt is extracted by the sulfonate group (-SO3−), which is a part of the side chain of Nafion. We found partial electron transfer from the H atom to the Pt, which directly binds to the -SO3− group, through this reaction. The electron-poor H atom conducts in Nafion, and the partial electron transfer from the H atom results in the generation of electric power in polymer electrolyte fuel cells (PEFCs). |
| Keywords: | 68 43 Bc 73 40 &minus c 82 35 Gh 82 47 Nj |
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