کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7124844 | 1461529 | 2014 | 6 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Potential step study of electrooxidation of methanol in 1-butyl-3-methylimidazolium tetrafluoroborate
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
سایر رشته های مهندسی
کنترل و سیستم های مهندسی
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چکیده انگلیسی
A potential step method was used to characterize the electrooxidation of methanol on a chemically modified electrode in an ionic liquid solvent. Two major findings were reported from this study. Firstly, the oxidation was dominant 2.2Â s after the potential step. Before that, the double layer charging and adsorption were dominant. Therefore, there should be a waiting time of a few seconds if a methanol sensor is developed with a potential step method. Secondly, the oxidation of methanol on the electrode was diffusion controlled. The concentration of methanol affected the diffusion. The diffusion constant D0 was 8.37Â ÃÂ 10â17Â m2/s when the concentration was lower than 0.5Â M and was 2.66Â ÃÂ 10â13Â m2/s when the concentration was higher than 1.0Â M. This suggests that the methanol concentration should be kept higher than a threshold in an ionic liquid based fuel cell.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Measurement - Volume 58, December 2014, Pages 21-26
Journal: Measurement - Volume 58, December 2014, Pages 21-26
نویسندگان
Michael L. Hainstock, Yijun Tang,