Simulation of OH– and oxygen transport in the air–cathode catalyst layer of microbial fuel cells
The mass transfer of OH– and oxygen within an air–cathode is critical for the performance of microbial fuel cells (MFCs). Improving the understanding of this complex transportation mechanism could help guide the design of air-cathodes to enhance the power density of MFCs. Herein, a 2D-agglomerate mo...
| Main Authors: | , , , , , , |
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| Format: | Article |
| Language: | English |
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Elsevier
2023-06-01
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| Series: | Electrochemistry Communications |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S1388248123000681 |
| _version_ | 1797831042591096832 |
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| author | Wenfang Cai Jiafeng Geng Shifeng Zhao Yucheng Zhu Yunhai Wang Qingyun Chen Kun Guo |
| author_facet | Wenfang Cai Jiafeng Geng Shifeng Zhao Yucheng Zhu Yunhai Wang Qingyun Chen Kun Guo |
| author_sort | Wenfang Cai |
| collection | DOAJ |
| description | The mass transfer of OH– and oxygen within an air–cathode is critical for the performance of microbial fuel cells (MFCs). Improving the understanding of this complex transportation mechanism could help guide the design of air-cathodes to enhance the power density of MFCs. Herein, a 2D-agglomerate model is developed to study OH– and O2 transfer, and electrochemical performance within an air–cathode MFC. The effects of key variables (binder volume fraction, and Pt/carbon mass ratio) on OH– and oxygen transport behavior have been investigated. Simulation results reveal that the OH– and oxygen concentrations within the catalyst layer are closely related to the catalyst layer structure. A lower volume fraction of Nafion® binder is beneficial to OH– and oxygen transfer, while the Pt/carbon mass ratio has complex effects on OH– and oxygen transfer and reactions. This work aims to improve our understanding of OH– and oxygen mass transfer and offers an effective approach to constructing high-performance air–cathode MFCs. |
| first_indexed | 2024-04-09T13:45:44Z |
| format | Article |
| id | doaj.art-34018b92a70f48e0aa75c225b18331ba |
| institution | Directory Open Access Journal |
| issn | 1388-2481 |
| language | English |
| last_indexed | 2024-04-09T13:45:44Z |
| publishDate | 2023-06-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Electrochemistry Communications |
| spelling | doaj.art-34018b92a70f48e0aa75c225b18331ba2023-05-09T04:05:00ZengElsevierElectrochemistry Communications1388-24812023-06-01151107494Simulation of OH– and oxygen transport in the air–cathode catalyst layer of microbial fuel cellsWenfang Cai0Jiafeng Geng1Shifeng Zhao2Yucheng Zhu3Yunhai Wang4Qingyun Chen5Kun Guo6School of Chemical Engineering and Technology, Xi'an Jiaotong University, Xi'an 710049, ChinaDepartment of Chemical Engineering, School of Water and Environment, Chang'an University, Xi’an 710054, ChinaState Key Laboratory of Multiphase Flow in Power Engineering, Xi'an Jiaotong University, Xi'an 710049, ChinaDepartment of Environmental Science and Engineering, Xi'an Jiaotong University, Xi'an 710049, ChinaDepartment of Environmental Science and Engineering, Xi'an Jiaotong University, Xi'an 710049, China; Corresponding authors.State Key Laboratory of Multiphase Flow in Power Engineering, Xi'an Jiaotong University, Xi'an 710049, ChinaSchool of Chemical Engineering and Technology, Xi'an Jiaotong University, Xi'an 710049, China; Corresponding authors.The mass transfer of OH– and oxygen within an air–cathode is critical for the performance of microbial fuel cells (MFCs). Improving the understanding of this complex transportation mechanism could help guide the design of air-cathodes to enhance the power density of MFCs. Herein, a 2D-agglomerate model is developed to study OH– and O2 transfer, and electrochemical performance within an air–cathode MFC. The effects of key variables (binder volume fraction, and Pt/carbon mass ratio) on OH– and oxygen transport behavior have been investigated. Simulation results reveal that the OH– and oxygen concentrations within the catalyst layer are closely related to the catalyst layer structure. A lower volume fraction of Nafion® binder is beneficial to OH– and oxygen transfer, while the Pt/carbon mass ratio has complex effects on OH– and oxygen transfer and reactions. This work aims to improve our understanding of OH– and oxygen mass transfer and offers an effective approach to constructing high-performance air–cathode MFCs.http://www.sciencedirect.com/science/article/pii/S1388248123000681Air-cathode MFCCatalyst layerMass transferOH– transport |
| spellingShingle | Wenfang Cai Jiafeng Geng Shifeng Zhao Yucheng Zhu Yunhai Wang Qingyun Chen Kun Guo Simulation of OH– and oxygen transport in the air–cathode catalyst layer of microbial fuel cells Electrochemistry Communications Air-cathode MFC Catalyst layer Mass transfer OH– transport |
| title | Simulation of OH– and oxygen transport in the air–cathode catalyst layer of microbial fuel cells |
| title_full | Simulation of OH– and oxygen transport in the air–cathode catalyst layer of microbial fuel cells |
| title_fullStr | Simulation of OH– and oxygen transport in the air–cathode catalyst layer of microbial fuel cells |
| title_full_unstemmed | Simulation of OH– and oxygen transport in the air–cathode catalyst layer of microbial fuel cells |
| title_short | Simulation of OH– and oxygen transport in the air–cathode catalyst layer of microbial fuel cells |
| title_sort | simulation of oh and oxygen transport in the air cathode catalyst layer of microbial fuel cells |
| topic | Air-cathode MFC Catalyst layer Mass transfer OH– transport |
| url | http://www.sciencedirect.com/science/article/pii/S1388248123000681 |
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