Title

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

Issue

9

First Page

601

Last Page

605

Publication Date

6-1-2005

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). © 2005 Elsevier Ltd. All rights reserved.

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Digitial Object Identifier (DOI)

10.1016/j.ssc.2005.03.006

Disciplines

Physics

Keywords

Anodes; Electrodes; Charge exchange; Protons; Density functionals

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