Microbial Battery Powered Enzymatic Electrosynthesis for Carbon Capture and Generation of Hydrogen and Formate from Dilute Organics
| Autor: | Xiaohan Shao, Alfred M. Spormann, Craig S. Criddle, Kristian L. Dubrawski, Ross D. Milton, Jörg S. Deutzmann |
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| Rok vydání: | 2019 |
| Předmět: |
Hydrogenase
Hydrogen Inorganic chemistry Energy Engineering and Power Technology chemistry.chemical_element 02 engineering and technology 010402 general chemistry Formate dehydrogenase Electrosynthesis 7. Clean energy 01 natural sciences law.invention chemistry.chemical_compound law Materials Chemistry Formate Renewable Energy Sustainability and the Environment 021001 nanoscience & nanotechnology Cathode 0104 chemical sciences Anode Fuel Technology chemistry Chemistry (miscellaneous) 0210 nano-technology Carbon |
| Zdroj: | ACS Energy Letters. 4:2929-2936 |
| ISSN: | 2380-8195 |
| Popis: | A microbial battery (MB) breaks down waste organics and stores the liberated electrons in a solid-state cathode. Here, we demonstrate that these electrons can be utilized, along with the products (e.g., carbon dioxide, CO2) of the MB, to electrochemically generate higher-value products from waste. We utilize a series-stacked MB with mediated enzymatic electrosynthesis (EES) to produce either hydrogen (H2) from protons (H+) or formate (HCOO–) from CO2 with the electrons and carbon directly derived from waste organics. We also demonstrate that a reduced solid-state cathode can be used as a solid-state anode as an electron source for EES. This work shows that higher-value products can be electrochemically generated at high faradaic efficiencies (up to 91% for hydrogenase and 72% for formate dehydrogenase) using the energy, electrons, and carbon contained in the waste organic input without the need for continuous oxygen, potentiostatic control, or supplemental power. |
| Databáze: | OpenAIRE |
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