کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
7733807 1497954 2015 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Shift of voltage reversal in stacked microbial fuel cells
ترجمه فارسی عنوان
تغییر ولتاژ در سلول های سوختی میکروبی انباشته شده
کلمات کلیدی
انحراف ولتاژ، سرعت واکنش شدید، تغییر زاویه ولتاژ، سلول های سوختی میکروبی انباشته شده، بیش از حد،
موضوعات مرتبط
مهندسی و علوم پایه شیمی الکتروشیمی
چکیده انگلیسی
We proved that sluggish kinetics on the cathode and the imbalance of cathode kinetics cause voltage reversal in a stacked microbial fuel cell (MFC) equipped with a non-Pt cathode. Catholyte aeration to a unit MFC against passive air diffusion to the cathode in the other unit MFC shifted voltage reversal between the two units, due to improved mass transport and O2 concentration effects in the aerated MFC. The shifted voltage reversal returned to an original status when catholyte aeration was stopped. A Pt-coated cathode increased the rate of oxygen reduction reaction (ORR) by a factor of ∼20, as compared to the non-Pt cathode. As a result, the anodic reaction rate that became slower than the rate on the Pt-cathode limited current density to overpotential in the stacked MFC equipped with the Pt-cathode. This work shows that dominant kinetic bottlenecks, which are the primary cause of voltage reversal, can be shifted between individual MFCs of stacked MFCs or electrodes depending on relative kinetics.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Power Sources - Volume 278, 15 March 2015, Pages 534-539
نویسندگان
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