Microbial electrosynthesis: carbonaceous electrode materials for CO2 conversion.
Microbial electrosynthesis: carbonaceous electrode materials for CO2 conversion.
复制标题
微生物电合成：用于CO2转化的碳质电极材料。
DOI：
10.1039/d2mh01178f
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发表时间：
2022
影响因子：
13.3
通讯作者：
V. Kumaravel
中科院分区：
文献类型：
--
作者：
G. S. Lekshmi;K. Bazaka;S. Ramakrishna;V. Kumaravel
微生物电合成(MES)是一种可持续的处理温室气体(GHG)排放的方法，使用人为二氧化碳(CO2)作为构建块来创造清洁燃料和高价值的化学品。基于MES的二氧化碳转化效率与电极材料的性能密切相关，特别是与碳素材料经常使用的阴极材料密切相关。与昂贵的金属电极相比，碳材料具有高比表面积、多种可能的形态和良好的化学稳定性，具有生物相容性，使用它们可以最大限度地促进细菌的生长和提高电子传递速率。例如，基于碳纳米管的MES阴极、石墨烯、氧化石墨烯、石墨、石墨毡、石墨质碳氮化物(g-C3N4)、活性碳、碳毡、碳点、碳纤维、碳刷、碳布、网状玻璃碳泡沫、MXenes和生物炭。在此，我们综述了最新的MES，包括支撑基于MES的二氧化碳转化的热力学和动力学过程，以及反应器类型和配置的影响，生物相容电解质的选择，产品的选择性，以及刺激生物质积累的新方法的使用。特别强调碳素电极材料、其3D生物打印和表面特征，以及使用废物衍生的碳或生物炭作为一种杰出的材料，以进一步改善利用碳饥渴的微生物转化二氧化碳的环境条件，并作为迈向循环经济的一步。MES将是一项出色的技术，可以利用大气中的二氧化碳为火星任务开发火箭燃料和生物衍生产品。
Microbial electrosynthesis (MES) is a sustainable approach to address greenhouse gas (GHG) emissions using anthropogenic carbon dioxide (CO2) as a building block to create clean fuels and highly valuable chemicals. The efficiency of MES-based CO2 conversion is closely related to the performance of electrode material and, in particular, the cathode for which carbonaceous materials are frequently used. Compared to expensive metal electrodes, carbonaceous materials are biocompatible with a high specific surface area, wide range of possible morphologies, and excellent chemical stability, and their use can maximize the growth of bacteria and enhance electron transfer rates. Examples include MES cathodes based on carbon nanotubes, graphene, graphene oxide, graphite, graphite felt, graphitic carbon nitride (g-C3N4), activated carbon, carbon felt, carbon dots, carbon fibers, carbon brushes, carbon cloth, reticulated vitreous carbon foam, MXenes, and biochar. Herein, we review the state-of-the-art MES, including thermodynamic and kinetic processes that underpin MES-based CO2 conversion, as well as the impact of reactor type and configuration, selection of biocompatible electrolytes, product selectivity, and the use of novel methods for stimulating biomass accumulation. Specific emphasis is placed on carbonaceous electrode materials, their 3D bioprinting and surface features, and the use of waste-derived carbon or biochar as an outstanding material for further improving the environmental conditions of CO2 conversion using carbon-hungry microbes and as a step toward the circular economy. MES would be an outstanding technique to develop rocket fuels and bioderived products using CO2 in the atmosphere for the Mars mission.