2013 Fiscal Year Final Research Report
Solar driven CO2 fixation using non-photosynthetic microbes and Fe ions as energy carrier
| Project/Area Number |
24655167
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| Research Category |
Grant-in-Aid for Challenging Exploratory Research
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| Allocation Type | Single-year Grants |
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| Research Field |
Functional materials/Devices
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| Research Institution | Institute of Physical and Chemical Research (2013)
The University of Tokyo (2012) |
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Principal Investigator |
NAKAMURA Ryuhei 独立行政法人理化学研究所, 環境資源科学研究センター, チームリーダー (10447419)
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| Project Period (FY) |
2012-04-01 – 2014-03-31
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| Keywords | 二酸化炭素固定 |
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| Research Abstract |
We exploited the ability of the deep-sea Fe-oxidizing bacteria, Mariprofundus ferrooxidans, to elevate the intracellular electrons into a higher energetic state as a built-in voltage multiplayer circuit. In-vivo electrochemical analysis of CO2 fixation processes revealed that the cells multiplies the voltage to 0.95 V, which enables to initiate the electrochemical CO2 reduction coupled with water oxidation at an external voltage of 0.19 V. The value of 0.19 V is one order of magnitude lower than the thermodynamic limit for producing organic compounds via CO2 reduction coupled with water oxidation. Thus, the integrated bioelectrochemical process could provide a way to utilize extremely low-voltage-electricity supplied by several sources such as hydro, solar, wind, geothermal, and others for the electrochemical conversion of CO2 to organic chemicals.
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