Electricity-Driven CO<sub>2</sub> Reduction

Abstract Excessive CO₂ emissions have threatened the sustainable development of the environment and energy, converting it into chemical raw materials or biofuels via chemical or biological methods can effectively alleviate the energy and environmental pressure caused by excessive CO₂ emissions. However, the reduction process of CO₂ is non-spontaneous and slow, relying on externally provided energy and catalysts. How to achieve long-term energy supply and develop high-performance catalysts is the core of the development of CO₂ recovery and conversion technology. The strategy of using stable and clean electricity as energy source, with the assistance of high-performance electrocatalysts, to convert CO₂ into chemical products while achieving the carbon neutral cycle, is called electricity-driven CO₂ reduction and it shows significant advantages in CO₂ conversion. In this review, the recent research progress of electricity-driven CO₂ reduction is introduced from two parts:CO₂ electrocatalytic reduction reaction and CO₂ microbial electrosynthesis. Firstly, for CO₂ electrocatalytic reduction reaction, the characteristics of different types of electrocatalysts, as well as optimization and modification methods are compared and discussed. Next, we summarize CO₂ microbial electrosynthesis from the pattern of electron transfer, including direct electron transfer and indirect electron transfer. The related work of indirect electron transfer using different electron mediators (such as H₂, formic acid, Fe²⁺ and NH₃) are extensively discussed. Finally, we illustrate the challenges and problems in the field of electricity-driven CO₂ reduction and discuss potential ways to address these problems.

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	Liu Dan
	Ma Zhe
	Liu Mengxiao
	Cao Yingxiu
	Song Hao

Keywords： CO₂ reduction electricity-drive CO₂ electrocatalytic reduction reaction microbial electrosynthesis

Received 2021-03-11;

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Liu Dan, Ma Zhe, Liu Mengxiao, Cao Yingxiu, Song Hao.Electricity-Driven CO₂ Reduction[J] Chemcial Industry and Engineering, 2021,V38(5): 1-12

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