کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7704916 | 1496903 | 2016 | 25 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Multiple electron transfer systems in oxygen reducing biocathodes revealed by different conditions of aeration/agitation
ترجمه فارسی عنوان
سیستم های انتقال الکترون چندگانه در اکسیژن زدایی زیست کاکائو ها با شرایط مختلف هوادهی / تحریک نشان داده شده است
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کلمات کلیدی
بیو کاتد، کاهش اکسیژن، سلول های سوختی میکروبی، هوادهی هیدرودینامیک، ولتامتری سیسیک،
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
الکتروشیمی
چکیده انگلیسی
Oxygen reducing biocathodes were formed at â 0.2 V/SCE (+ 0.04 V/SHE) from compost leachate. Depending on whether aeration was implemented or not, two different redox systems responsible for the electrocatalysis of oxygen reduction were evidenced. System I was observed at low potential (â 0.03 V/SHE) on cyclic voltammetries (CVs). It appeared during the early formation of the biocathode (few hours) and resisted the hydrodynamic conditions induced by the aeration. System II was observed at higher potential on CV (+ 0.46 V/SHE); it required a longer lag time (up to 10 days) and quiescent conditions to produce an electrochemical signal. The hydrodynamic effects produced by the forced aeration led to its extinction. From their different behaviors and examples in the literature, system I was identified as being a membrane-bound cytochrome-related molecule, while system II was identified as a soluble redox mediator excreted by the biofilm. This study highlighted the importance of controlling the local hydrodynamics to design efficient oxygen reducing biocathodes able to operate at high potential.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Bioelectrochemistry - Volume 110, August 2016, Pages 46-51
Journal: Bioelectrochemistry - Volume 110, August 2016, Pages 46-51
نویسندگان
Mickaël Rimboud, Alain Bergel, Benjamin Erable,