Enhancing Biohybrid CO2 to Multicarbon Reduction via Adapted Whole-Cell Catalysts,Nano Letters

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Enhancing Biohybrid CO2 to Multicarbon Reduction via Adapted Whole-Cell Catalysts
Nano Letters ( IF 9.6 ) Pub Date : 2022-06-17 , DOI: 10.1021/acs.nanolett.2c01576
Jimin Kim _{1,

2} , Stefano Cestellos-Blanco _{1,

2} , Yue-Xiao Shen _{3,

4} , Rong Cai ₃ , Peidong Yang _{1,

2,

3,

5,

6}

Affiliation

Catalytic CO₂ conversion to renewable fuel is of utmost importance to establish a carbon-neutral society. Bioelectrochemical CO₂ reduction, in which a solid cathode interfaces with CO₂-reducing bacteria, represents a promising approach for renewable and sustainable fuel production. The rational design of biocatalysts in the biohybrid system is imperative to effectively reduce CO₂ into valuable chemicals. Here, we introduce methanol adapted Sporomusa ovata (S. ovata) to enhance the slow metabolic activity of wild-type microorganisms to our semiconductive silicon nanowires (Si NWs) array for efficient CO₂ reduction. The adapted whole-cell catalysts enable an enhancement of CO₂ fixation with a superior faradaic efficiency on the poised Si NWs cathode. The synergy of the high-surface-area cathode and the adapted strain achieves a CO₂-reducing current density of 0.88 ± 0.11 mA/cm², which is 2.4-fold higher than the wild-type strain. This new generation of biohybrids using adapted S. ovata also decreases the charge transfer resistance at the cathodic interface and facilitates the faster charge transfer from the solid electrode to bacteria.

中文翻译：

通过适应的全细胞催化剂增强生物混合 CO2 以减少多碳

_{将 CO 2}催化转化为可再生燃料对于建立碳中和社会至关重要。生物电化学 CO ₂还原，其中固体阴极与 CO ₂还原细菌接口，代表了可再生和可持续燃料生产的有前途的方法。生物混合系统中生物催化剂的合理设计对于有效地将CO ₂还原为有价值的化学品至关重要。在这里，我们在我们的半导体硅纳米线 (Si NWs) 阵列中引入了甲醇改造的 Sporomusa ovata ( S. ovata ) 以增强野生型微生物的缓慢代谢活性，从而实现高效的 CO ₂减少。适应的全细胞催化剂能够增强 CO ₂的固定，并在稳定的 Si NWs 阴极上具有出色的法拉第效率。高表面积阴极和适应应变的协同作用实现了0.88 ± 0.11 mA/cm ^{2的 CO}₂还原电流密度，比野生型应变高 2.4 倍。这种使用适应的S. ovata的新一代生物杂化物还降低了阴极界面的电荷转移电阻，并促进了从固体电极到细菌的更快电荷转移。

更新日期：2022-06-17

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