MICRO-RHEOLOGY CHANGES OF NAFION(R) FILMS WITH ELECTROCHEMICAL MASS-TRANSPORT IN HYDROQUINONE SOLUTIONS AND IN SITU MEASUREMENT USING A QUARTZ CRYSTAL ANALYZER
MICRO-RHEOLOGY CHANGES OF NAFION(R) FILMS WITH ELECTROCHEMICAL MASS-TRANSPORT IN HYDROQUINONE SOLUTIONS AND IN SITU MEASUREMENT USING A QUARTZ CRYSTAL ANALYZER
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DOI：
10.1016/0022-0728(93)80092-v
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发表时间：
1993-04-02
影响因子：
4.5
通讯作者：
ATAKA, T
中科院分区：
文献类型：
--
作者：
MURAMATSU, H;YE, XJ;ATAKA, T
本文表明，电化学传质在膜涂层电极涉及的薄膜的流变学变化，这些变化可以通过测量的谐振频率和谐振电阻的涂层石英晶体。我们使用了一个涂有Nafion（R）的石英晶体，并测量了对苯二酚溶液中的循环伏安图。共振频率和共振电阻的变化表明，在Nafion膜中发生了质量传输和粘弹性变化。图中共振频率和共振电阻的变化表明，在第一次氧化过程中，薄膜中的钠离子脱掺杂减少了薄膜质量，增加了薄膜硬度，在随后的氧化过程中，苯醌的积累和阴离子掺杂增加了薄膜质量，而钠离子在第一次还原过程中重新掺杂，在最终还原过程中，苯醌从薄膜中被还原。对反应所消耗的电荷的研究表明，阴离子或水的运输参与了反应。
This paper shows that the electrochemical mass transport in film-coated electrodes involves the rheology change of the films and that these changes can be detected by measuring the resonant frequency and resonant resistance of a coated quartz crystal. We used a Nafion(R)-coated quartz crystal and measured the cyclic voltammograms in hydroquinone solution. The changes of the resonant frequency and resonant resistance showed that mass transport and viscoelastic changes had occurred in the Nafion films. The diagrammed resonant frequency and resonant resistance changes suggested that the Na ion de-doping from the films decreased the film mass and increased the film rigidity in the first oxidation process, the benzoquinone accumulation and anion doping increased the film mass in the following oxidation process, while the Na ion re-doped in the first reduction process, and benzoquinone was reduced from the films in the final reduction process. Study of the charge expended from the reaction suggested the participation of anion or water transport.