Role of microbial electrosynthesis system in CO2 capture and conversion: a recent advancement toward cathode development

Frontiers in Microbiology

Microbiology

Bor Chyan Jong¹  Irwan Ibrahim²  Mimi Hani Abu Bakar²  Muhammad Farhan Hil Me²  Swee Su Lim²  Krishan Balachandran²  Kee Shyuan Loh²  Mohd Nur Ikhmal Salehmin³ 

[1] Agrotechnology and Bioscience Division, Malaysian Nuclear Agency, Kajang, Malaysia;Fuel Cell Institute, Universiti Kebangsaan Malaysia, Bangi, Malaysia;Institute of Sustainable Energy (ISE), Universiti Tenaga Nasional (UNITEN), Putrajaya Campus, Kajang, Malaysia;

关键词: microbial electrosynthesis;    CO sequestration;    cathode modification;    carbon capture;    advanced material;    biocatalyst;    techno-economic;    CORR;   

DOI  :  10.3389/fmicb.2023.1192187

 received in 2023-03-23, accepted in 2023-06-26,  发布年份 2023

来源: Frontiers

【 摘 要 】

Microbial electrosynthesis (MES) is an emerging electrochemical technology currently being researched as a CO2 sequestration method to address climate change. MES can convert CO2 from pollution or waste materials into various carbon compounds with low energy requirements using electrogenic microbes as biocatalysts. However, the critical component in this technology, the cathode, still needs to perform more effectively than other conventional CO2 reduction methods because of poor selectivity, complex metabolism pathways of microbes, and high material cost. These characteristics lead to the weak interactions of microbes and cathode electrocatalytic activities. These approaches range from cathode modification using conventional engineering approaches to new fabrication methods. Aside from cathode development, the operating procedure also plays a critical function and strategy to optimize electrosynthesis production in reducing operating costs, such as hybridization and integration of MES. If this technology could be realized, it would offer a new way to utilize excess CO2 from industries and generate profitable commodities in the future to replace fossil fuel-derived products. In recent years, several potential approaches have been tested and studied to boost the capabilities of CO2-reducing bio-cathodes regarding surface morphology, current density, and biocompatibility, which would be further elaborated. This compilation aims to showcase that the achievements of MES have significantly improved and the future direction this is going with some recommendations.Highlights– MES approach in carbon sequestration using the biotic component.– The role of microbes as biocatalysts in MES and their metabolic pathways are discussed.– Methods and materials used to modify biocathode for enhancing CO2 reduction are presented.

【 授权许可】

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Copyright © 2023 Ibrahim, Salehmin, Balachandran, Hil Me, Loh, Abu Bakar, Jong and Lim.