دورية أكاديمية
Graphite anode surface modification with controlled reduction of specific aryl diazonium salts for improved microbial fuel cells power output.
| العنوان: | Graphite anode surface modification with controlled reduction of specific aryl diazonium salts for improved microbial fuel cells power output. |
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| المؤلفون: | Picot, M., Lapinsonnière, L., Rothballer, M., Barrière, F. |
| المصدر: | Biosens. Bioelectron. 28, 181-188 (2011) |
| بيانات النشر: | Elsevier |
| سنة النشر: | 2011 |
| المجموعة: | PuSH - Publikationsserver des Helmholtz Zentrums München |
| مصطلحات موضوعية: | Microbial fuel cells, Electrode modification, Aryl diazonium, Graphite, Geobacter, Electroactive biofilm |
| الوصف: | Graphite electrodes were modified with reduction of aryl diazonium salts and implemented as anodes in microbial fuel cells. First, reduction of 4-aminophenyl diazonium is considered using increased coulombic charge density from 16.5 to 200 mC/cm(2). This procedure introduced aryl amine functionalities at the surface which are neutral at neutral pH. These electrodes were implemented as anodes in "H" type microbial fuel cells inoculated with waste water, acetate as the substrate and using ferricyanide reduction at the cathode and a 1000 Ω external resistance. When the microbial anode had developed, the performances of the microbial fuel cells were measured under acetate saturation conditions and compared with those of control microbial fuel cells having an unmodified graphite anode. We found that the maximum power density of microbial fuel cell first increased as a function of the extent of modification, reaching an optimum after which it decreased for higher degree of surface modification, becoming even less performing than the control microbial fuel cell. Then, the effect of the introduction of charged groups at the surface was investigated at a low degree of surface modification. It was found that negatively charged groups at the surface (carboxylate) decreased microbial fuel cell power output while the introduction of positively charged groups doubled the power output. Scanning electron microscopy revealed that the microbial anode modified with positively charged groups was covered by a dense and homogeneous biofilm. Fluorescence in situ hybridization analyses showed that this biofilm consisted to a large extent of bacteria from the known electroactive Geobacter genus. In summary, the extent of modification of the anode was found to be critical for the microbial fuel cell performance. The nature of the chemical group introduced at the electrode surface was also found to significantly affect the performance of the microbial fuel cells. The method used for modification is easy to control and can be optimized and ... |
| نوع الوثيقة: | article in journal/newspaper |
| اللغة: | English |
| تدمد: | 0956-5663 1873-4235 |
| العلاقة: | info:eu-repo/semantics/altIdentifier/pmid/21803564; info:eu-repo/semantics/altIdentifier/wos/undefined; info:eu-repo/semantics/altIdentifier/isbn/0956-5663; info:eu-repo/semantics/altIdenti; https://push-zb.helmholtz-muenchen.de/frontdoor.php?source_opus=5621Test; urn:isbn:0956-5663; urn:issn:0956-5663; urn:issn:1873-4235 |
| DOI: | 10.1016/j.bios.2011.07.017 |
| الإتاحة: | https://doi.org/10.1016/j.bios.2011.07.017Test https://push-zb.helmholtz-muenchen.de/frontdoor.php?source_opus=5621Test |
| حقوق: | info:eu-repo/semantics/closedAccess |
| رقم الانضمام: | edsbas.72F8DD |
| قاعدة البيانات: | BASE |
| تدمد: | 09565663 18734235 |
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| DOI: | 10.1016/j.bios.2011.07.017 |