Behavior of hydrogen atom at Nafion-Pt interface

Behavior of hydrogen atom at Nafion-Pt interface

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 Naf...

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Bibliographic Details
Main Authors: Tsuda, Muneyuki, Diño, Wilson Agerico, Kasai, Hideaki
Format: text
Published: Animo Repository 2005
Subjects:
Proton exchange membrane fuel cells
Anodes
Charge exchange
Density functionals
Physics
Online Access:https://animorepository.dlsu.edu.ph/faculty_research/6625
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Institution: De La Salle University
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Summary: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).

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