Highly charged fullerene anions electrochemically stabilized by anionic polymers
Highly charged fullerene anions electrochemically stabilized by anionic polymers
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DOI：
10.1016/j.elecom.2019.106619
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发表时间：
2020
影响因子：
5.4
通讯作者：
H. Ueda;Katsuhiko Nishiyama;Soichiro Yoshimoto
中科院分区：
文献类型：
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作者：
H. Ueda;Katsuhiko Nishiyama;Soichiro Yoshimoto
氧化还原活性分子在电极上的溶解阻碍了相应氧化还原反应的持久性。在本研究中，我们提出阴离子聚合物的外涂层作为溶解问题的可能解决方案。富勒烯被选为模型氧化还原活性分子，因为它能够接受多个电子。两种阴离子聚合物的屏障功能进行了评估，通过监测峰电流的氧化还原反应的富勒烯，使用循环伏安法。Nafion对富勒烯物种的溶解表现出更好的阻挡作用，并分别稳定了C60和C70的四个和五个氧化还原反应。另一方面，虽然磺化聚苯乙烯-嵌段-聚（乙烯-然-丁烯）-嵌段-聚苯乙烯在电化学电位窗口中显示出更负的阴极极限，但富勒烯物种的溶解与未覆盖的富勒烯薄膜一样快。
The dissolution of redox-active molecules on electrodes hinders the durability of the corresponding redox reactions. In this study, we propose the overcoating of anionic polymers as a possible solution to the dissolution problem. Fullerene was chosen as a model redox-active molecule due to its ability to accept multiple electrons. The barrier function of two anionic polymers was evaluated by monitoring the peak currents for the redox reactions of fullerenes using cyclic voltammetry. Nafion exhibited a better barrier effect on the dissolution of fullerene species and stabilized up to four and five redox reactions of C60and C70, respectively. On the other hand, although sulfonated polystyrene-block-poly(ethylene-ran-butylene)-block-polystyrene showed a more negative cathodic limit in the electrochemical potential window, the dissolution of fullerene species occurred as fast as for uncovered fullerene thin films.