Abstract
To address the energy crisis and alleviate the rising level of CO2 in the atmosphere, various CO2 capture and utilization (CCU) technologies have been developed. The use of electro-enzyme coupling systems is a promising strategy for the sustainable production of fuels, chemicals and materials using CO2 as the feedstock. In this review, the recent progresses in the development of electro-enzyme coupling systems for the selective reduction of CO2 are systematically summarized. We first provide a brief background about the significance and challenges in the direct conversion of CO2 into value-added chemicals. Next, we describe the materials and strategies in the design of electrodes, as well as the common enzymes used in the electro-enzyme coupling systems. Then, we focus on the state-of-the-art routes for the electro-enzyme coupling conversion of CO2 into a variety of compounds (formate, CO, methanol, C≥2 chemicals) by a single enzyme or multienzyme systems. The emerging approaches and materials used for the construction of electro-enzyme coupling systems to enhance the electron transfer efficiency and the catalytic activity/stability are highlighted. The main challenges and perspectives in the integration of enzymatic and electrochemical strategies are also discussed.
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