Live microalgal cells modified by L‐cys/Au@carbon dots/bilirubin oxidase layers for enhanced oxygen reduction in a membrane‐less biofuel cell
Abstract Electrochemical oxygen reduced reaction (ORR) is a critical element in clean energy development. Despite efforts to enhance gas transfer to the reaction interface, the low solubility of O2 molecules and slow diffusion rate in liquid electrolyte is still a significant challenge. Herein, we d...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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Wiley
2022-06-01
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| Series: | SmartMat |
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| Online Access: | https://doi.org/10.1002/smm2.1100 |
| _version_ | 1811342585243893760 |
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| author | Sili Qing Lin‐Lin Wang Li‐Ping Jiang Xiaoge Wu Jun‐Jie Zhu |
| author_facet | Sili Qing Lin‐Lin Wang Li‐Ping Jiang Xiaoge Wu Jun‐Jie Zhu |
| author_sort | Sili Qing |
| collection | DOAJ |
| description | Abstract Electrochemical oxygen reduced reaction (ORR) is a critical element in clean energy development. Despite efforts to enhance gas transfer to the reaction interface, the low solubility of O2 molecules and slow diffusion rate in liquid electrolyte is still a significant challenge. Herein, we design an artificial outer membrane on microalgal cells, which consists of a carbon dots/bilirubin oxidase (CDs/BOD) ORR catalyst layer and a L‐cystine/Au nanoporous O2 supply layer. O2 generated by photosynthesis from microalgal cells then can be directly transported to the CDs/BOD catalytic interfaces, overcoming the sluggish gas transfer in the electrolyte. Thus, the cathode constructed by the fabricated microalgal cells realizes an ORR current density of 655.2 μA/cm2 with fast ORR kinetics, which is 2.68 times higher than that of a BOD cathode fed with pure O2. A membrane‐less glucose/O2 biofuel cell is further developed using the hybrid artificial cells as the cathode, and the power density is 2.39 times higher than that of a BOD cathode biofuel cell in O2 saturated solution. This biomimetic design supplies O2 directly to the carbon dots/BOD catalyst layer from the microalgae membrane through a nanoporous L‐cys/Au layer, providing an alternative solution for the transfer barrier of O2 in the electrolyte. |
| first_indexed | 2024-04-13T19:13:30Z |
| format | Article |
| id | doaj.art-2cf9af06ac7745608e8a7a4635af7db9 |
| institution | Directory Open Access Journal |
| issn | 2688-819X |
| language | English |
| last_indexed | 2024-04-13T19:13:30Z |
| publishDate | 2022-06-01 |
| publisher | Wiley |
| record_format | Article |
| series | SmartMat |
| spelling | doaj.art-2cf9af06ac7745608e8a7a4635af7db92022-12-22T02:33:45ZengWileySmartMat2688-819X2022-06-013229831010.1002/smm2.1100Live microalgal cells modified by L‐cys/Au@carbon dots/bilirubin oxidase layers for enhanced oxygen reduction in a membrane‐less biofuel cellSili Qing0Lin‐Lin Wang1Li‐Ping Jiang2Xiaoge Wu3Jun‐Jie Zhu4State Key Laboratory of Analytical Chemistry for Life Science, School of Chemistry and Chemical Engineering Nanjing University Nanjing ChinaState Key Laboratory of Analytical Chemistry for Life Science, School of Chemistry and Chemical Engineering Nanjing University Nanjing ChinaState Key Laboratory of Analytical Chemistry for Life Science, School of Chemistry and Chemical Engineering Nanjing University Nanjing ChinaEnvironment Science and Engineering College Yangzhou University Yangzhou ChinaState Key Laboratory of Analytical Chemistry for Life Science, School of Chemistry and Chemical Engineering Nanjing University Nanjing ChinaAbstract Electrochemical oxygen reduced reaction (ORR) is a critical element in clean energy development. Despite efforts to enhance gas transfer to the reaction interface, the low solubility of O2 molecules and slow diffusion rate in liquid electrolyte is still a significant challenge. Herein, we design an artificial outer membrane on microalgal cells, which consists of a carbon dots/bilirubin oxidase (CDs/BOD) ORR catalyst layer and a L‐cystine/Au nanoporous O2 supply layer. O2 generated by photosynthesis from microalgal cells then can be directly transported to the CDs/BOD catalytic interfaces, overcoming the sluggish gas transfer in the electrolyte. Thus, the cathode constructed by the fabricated microalgal cells realizes an ORR current density of 655.2 μA/cm2 with fast ORR kinetics, which is 2.68 times higher than that of a BOD cathode fed with pure O2. A membrane‐less glucose/O2 biofuel cell is further developed using the hybrid artificial cells as the cathode, and the power density is 2.39 times higher than that of a BOD cathode biofuel cell in O2 saturated solution. This biomimetic design supplies O2 directly to the carbon dots/BOD catalyst layer from the microalgae membrane through a nanoporous L‐cys/Au layer, providing an alternative solution for the transfer barrier of O2 in the electrolyte.https://doi.org/10.1002/smm2.1100biofuel cellscarbon dotsmicroalgal cellsO2 supply in situ |
| spellingShingle | Sili Qing Lin‐Lin Wang Li‐Ping Jiang Xiaoge Wu Jun‐Jie Zhu Live microalgal cells modified by L‐cys/Au@carbon dots/bilirubin oxidase layers for enhanced oxygen reduction in a membrane‐less biofuel cell SmartMat biofuel cells carbon dots microalgal cells O2 supply in situ |
| title | Live microalgal cells modified by L‐cys/Au@carbon dots/bilirubin oxidase layers for enhanced oxygen reduction in a membrane‐less biofuel cell |
| title_full | Live microalgal cells modified by L‐cys/Au@carbon dots/bilirubin oxidase layers for enhanced oxygen reduction in a membrane‐less biofuel cell |
| title_fullStr | Live microalgal cells modified by L‐cys/Au@carbon dots/bilirubin oxidase layers for enhanced oxygen reduction in a membrane‐less biofuel cell |
| title_full_unstemmed | Live microalgal cells modified by L‐cys/Au@carbon dots/bilirubin oxidase layers for enhanced oxygen reduction in a membrane‐less biofuel cell |
| title_short | Live microalgal cells modified by L‐cys/Au@carbon dots/bilirubin oxidase layers for enhanced oxygen reduction in a membrane‐less biofuel cell |
| title_sort | live microalgal cells modified by l cys au carbon dots bilirubin oxidase layers for enhanced oxygen reduction in a membrane less biofuel cell |
| topic | biofuel cells carbon dots microalgal cells O2 supply in situ |
| url | https://doi.org/10.1002/smm2.1100 |
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