Electrosynthesis of Organic Compounds from Carbon Dioxide Is Catalyzed by a Diversity of Acetogenic Microorganisms
Electrosynthesis of Organic Compounds from Carbon Dioxide Is Catalyzed by a Diversity of Acetogenic Microorganisms
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DOI：
10.1128/aem.02642-10
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发表时间：
2011-05-01
影响因子：
4.4
通讯作者：
Lovley, Derek R.
中科院分区：
文献类型：
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作者：
Nevin, Kelly P.;Hensley, Sarah A.;Lovley, Derek R.
微生物电合成是微生物利用电极产生的电子将二氧化碳还原为多碳的胞外有机化合物的过程，是一种潜在的策略，用于捕获易于储存和易于分配的产品（如运输燃料）的碳-碳键中的电能。迄今为止，只有一种生物，产乙酸菌卵孢菌，已被证明能够电合成。本研究的目的是确定是否有更广泛的微生物能够进行此过程。其他几种产乙酸细菌，包括另外两种Sporomusa物种，杨氏梭菌，醋酸梭菌和Moorella thermoacetica，消耗电流产生有机酸。通常乙酸是主要产物，但也形成2-氧代丁酸和甲酸，其中2-氧代丁酸是C.醋酸。S. sphaeroides、球壳隐杆藻C. ljungdahlii和M.热醋酸菌具有高的（> 80%）电子消耗效率和在鉴定的产物中回收。产乙酸菌伍氏醋酸杆菌不能消耗电流。这些结果扩大了已知的能够电合成的微生物范围，为进一步优化该过程提供了多种选择。
Microbial electrosynthesis, a process in which microorganisms use electrons derived from electrodes to reduce carbon dioxide to multicarbon, extracellular organic compounds, is a potential strategy for capturing electrical energy in carbon-carbon bonds of readily stored and easily distributed products, such as transportation fuels. To date, only one organism, the acetogen Sporomusa ovata, has been shown to be capable of electrosynthesis. The purpose of this study was to determine if a wider range of microorganisms is capable of this process. Several other acetogenic bacteria, including two other Sporomusa species, Clostridium ljungdahlii, Clostridium aceticum, and Moorella thermoacetica, consumed current with the production of organic acids. In general acetate was the primary product, but 2-oxobutyrate and formate also were formed, with 2-oxobutyrate being the predominant identified product of electrosynthesis by C. aceticum. S. sphaeroides, C. ljungdahlii, and M. thermoacetica had high (> 80%) efficiencies of electrons consumed and recovered in identified products. The acetogen Acetobacterium woodii was unable to consume current. These results expand the known range of microorganisms capable of electrosynthesis, providing multiple options for the further optimization of this process.