Potential-Dependent Adsorption and Desorption of Perfluorosulfonated Ionomer on a Platinum Electrode Surface Probed by Electrochemical Quartz Crystal Microbalance and Atomic Force Microscopy

被引：49
作者：
Masuda, Takuya [1 ,2 ]
Sonsudin, Faridah [1 ]
Singh, Pankaj R. [1 ]
Naohara, Hideo [1 ]
Uosaki, Kohei [1 ,2 ,3 ]
机构：
[1] Hokkaido Univ, Grad Sch Sci, Div Chem, Sapporo, Hokkaido 0600810, Japan
[2] NIMS, Global Res Ctr Environm & Energy Based Nanomat Sc, Tsukuba, Ibaraki 3050044, Japan
[3] NIMS, Int Ctr Mat Nanoarchitechton WPI MANA, Tsukuba, Ibaraki 3050044, Japan
来源：
JOURNAL OF PHYSICAL CHEMISTRY C | 2013年 / 117卷 / 30期
关键词：
OXYGEN REDUCTION REACTION; SOLID POLYMER ELECTROLYTE; IN-SITU; THIN-FILM; FUEL-CELL; HYDROGEN OXIDATION; PERCHLORIC-ACID; GOLD ELECTRODE; O-2; REDUCTION; KINETICS;
D O I：
10.1021/jp404376t
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
Potential-dependent adsorption/desorption behavior of perfluorosulfonated ionomer (PFSI) on a platinum electrode was investigated by cyclic voltammetry, electrochemical quartz crystal microbalance (EQCM), and electrochemical atomic force microscope (EC-AFM) in a Nafion, that is, PFSI, dispersed aqueous solution without any other electrolyte. PFSI adsorbed on the platinum surface in the potential region between 0.1 and 0.8 V versus Ag/AgCl and desorbed from the surface at 1.1 V where place-exchanged Pt oxide was formed. Once platinum oxide was reduced, PFSI readsorbed on the surface. These processes took place reversibly.
引用
收藏
页码：15704 / 15709
页数：6
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