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Study of Nafion molecules adsorption on Au(111) using SXS

Notsu, Hideo*; Umemura, Shun*; Tamura, Kazuhisa   ; Yagi, Ichizo*

For more durable PEFC, the development of more active and durable catalyst must be required. For the purpose, the understanding of the interaction between catalyst surface and ionomer is needed. Cyclic voltammograms of Au single crystal electrode in electrolytes containing Nafion molecules are different from that of in sulfuric and perchloric acid solutions. It indicates that the phase transition process of the adsorbed Nafion molecules is different from that of sulfate and perchloride anions. However, the detail of surface process have not been understood. In this study, the adsorption process of Nafion molecule on a Au(111) electrode was monitored using SXS.

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