Behavior of hydrogen atom at Nafion-Pt interface

College

College of Science

Department/Unit

Physics

Document Type

Article

Source Title

Solid State Communications

Volume

134

First Page

601

Last Page

605

Publication Date

2005

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).

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Disciplines

Physics

Keywords

Proton exchange membrane fuel cells; Anodes; Charge exchange; Density functionals

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