Light-driven biohybrid system utilizes N2 for photochemical CO2 reduction

被引:16
|
作者
Zeng, Jin-Yue [1 ,2 ]
Wang, Xiao-Shuang [1 ,2 ]
Liu, Xin-Hua [1 ,2 ]
Li, Qian-Ru [1 ,2 ]
Feng, Jun [1 ,2 ]
Zhang, Xian-Zheng [1 ,2 ,3 ]
机构
[1] Wuhan Univ, Minist Educ, Key Lab Biomed Polymers, Wuhan 430072, Peoples R China
[2] Wuhan Univ, Dept Chem, Wuhan 430072, Peoples R China
[3] Chinese Acad Med Sci, Wuhan Res Ctr Infect Dis & Canc, Wuhan 430071, Peoples R China
基金
中国国家自然科学基金;
关键词
biohybrid; photocatalysis; CO2; reduction; nitrogen fixation; bacterium; NITROGEN REDUCTION; PHOTOREDUCTION; AZOTOFIXANS; FIXATION; AMMONIUM; COBALT; CARBON; GENES; NIFH;
D O I
10.1093/nsr/nwad142
中图分类号
O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];
学科分类号
07 ; 0710 ; 09 ;
摘要
Light-driven biohybrid system was created for achieving effective photochemical CO2 reduction by utilizing abundant, atmospheric N-2 via biological nitrogen fixation to produce electron donors. Attempting to couple photochemical CO2 reduction with N-2 fixation is usually difficult, because the reaction conditions for these two processes are typically incompatible. Here, we report that a light-driven biohybrid system can utilize abundant, atmospheric N-2 to produce electron donors via biological nitrogen fixation, to achieve effective photochemical CO2 reduction. This biohybrid system is constructed by incorporating molecular cobalt-based photocatalysts into N-2-fixing bacteria. It is found that N-2-fixing bacteria can convert N-2 into reductive organic nitrogen and create a localized anaerobic environment, which allows the incorporated photocatalysts to continuously perform photocatalytic CO2 reduction under aerobic conditions. Specifically, the light-driven biohybrid system displays a high formic acid production rate of over 1.41 x 10(-14) mol h(-1) cell(-1) under visible light irradiation, and the organic nitrogen content undergoes an over-3-fold increase within 48 hours. This work offers a useful strategy for coupling CO2 conversion with N-2 fixation under mild and environmentally benign conditions.
引用
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页数:13
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