甲酸脱氢酶
电催化剂
化学
格式化
碳酸酐酶
电解质
基质(水族馆)
电解
固碳
无机化学
化学工程
电极
电化学
二氧化碳
催化作用
生物化学
酶
有机化学
地质学
海洋学
物理化学
工程类
作者
Samuel J. Cobb,Azim Dharani,Ana Rita Oliveira,Inês Pereira,Erwin Reisner
标识
DOI:10.1002/anie.202218782
摘要
The electrolysis of dilute CO2 streams suffers from low concentrations of dissolved substrate and its rapid depletion at the electrolyte-electrocatalyst interface. These limitations require first energy-intensive CO2 capture and concentration, before electrolyzers can achieve acceptable performances. For direct electrocatalytic CO2 reduction from low-concentration sources, we introduce a strategy that mimics the carboxysome in cyanobacteria by utilizing microcompartments with nanoconfined enzymes in a porous electrode. A carbonic anhydrase accelerates CO2 hydration kinetics and minimizes substrate depletion by making all dissolved carbon available for utilization, while a highly efficient formate dehydrogenase reduces CO2 cleanly to formate; down to even atmospheric concentrations of CO2 . This bio-inspired concept demonstrates that the carboxysome provides a viable blueprint for the reduction of low-concentration CO2 streams to chemicals by using all forms of dissolved carbon.
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