期刊
JOULE
卷 4, 期 4, 页码 800-811出版社
CELL PRESS
DOI: 10.1016/j.joule.2020.03.001
关键词
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资金
- National Aeronautics and Space Administration (NASA) [NNX17AJ31G]
- USTC-Suzhou Industrial Park
- Philomathia Foundation
Microbial electro- and photo-electrochemical CO2 fixation, in which CO2-reducing microorganisms are directly interfaced with a cathode material, represent promising approaches for sustainable fuel production. Although considerable efforts have been invested to optimize microorganism species and electrode materials, the microorganism-cathode interface has not been systematically studied. Here, investigation of the interface allowed us to optimize the CO2-reducing rate of silicon nanowire/Sporomusa ovata system. Tuning the bulk electrolyte pH and increasing its buffering capacity supported the formation of a close-packed nanowire-bacteria cathode. Consequently, the resulting close-packed biohybrid achieved a CO2 reducing current density of similar to 0.65 mA cm(-2). When coupled with a photovoltaic device, our system enabled solar-to-acetate production with similar to 3.6% efficiency over 7 days.
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