Preparation of cobalt polyporphine and its catalytic properties in oxygen electroreduction
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- 作者：D. V. Konev ; K. V. Lizgina ; D. K. Khairullina…
- 刊名：Russian Journal of Electrochemistry
- 出版年：2016
- 出版时间：August 2016
- 年：2016
- 卷：52
- 期：8
- 页码：778-787
- 全文大小：1,323 KB
- 刊物类别：Chemistry and Materials Science
- 刊物主题：Chemistry
Electrochemistry
Physical Chemistry
Russian Library of Science - 出版者：MAIK Nauka/Interperiodica distributed exclusively by Springer Science+Business Media LLC.
- ISSN：1608-3342
- 卷排序：52
文摘
A new member of the polyporphine series—cobalt polyporphine of type I (pCoP-I)—was prepared from the starting magnesium polyporphine of type I (pMgP-I) by ion exchange, i.e. by sequential processing of the pMgP-I polymer film on the electrode surface with solutions of trifluoroacetic acid (forming metalfree polyporphine of type I, pH2P-I) and cobalt(II) acetate in organic solvents. The completeness of each stage of ion exchange can be judged from the change in the electrochemical and spectral characteristics of the obtained polymer films of unsubstituted porphine (?H2P-I) and cobalt porphine (pCoP-I) of type I. Oxidative transformation of this polyporphine pCoP-I was performed, which led to the formation of additional bonds between the neighboring porphine units in the polymer film (transition of polymer of type I into polymer of type II, pCoP-II). The behavior of the polymer films of cobalt polyporphine of types I and II in oxygen electroreduction was studied. The films showed catalytic activity in this process.Keywordselectropolymerizationporphinemetal porphinesconductive polymeroxygen electroreductionpolymer-modified electrodes