Covalent Organic Framework-Bacteria Cascades for Sustainable Carbon Dioxide Reduction

人工光合作用虽然为可持续和清洁能源铺平了道路，但这一进程经常受到低效催化以及昂贵和有毒材料的阻碍。然而，大自然一直在追求阳光驱动的复杂化学转化，具有高选择性和准确性。然而，这种催化能力主要局限于自然发生的反应，在实际应用中效率不高。为了实现这一目标，整合自然和人工光合作用的力量，将利用每种成分最显著的特性，实现高效的太阳能-化学转化。在此，我们设计了一个共价有机框架-细菌生物杂化体来催化二氧化碳还原反应生成乙酸盐。一个photosheet （COF|IO- ITO|polythiophenes:RuO2）与卵孢菌（Sporomusa ovata）结合，将利用太阳能仅使用二氧化碳和水选择性地生产乙酸盐。该过程将提供非常理想的可持续性，因为它将在不牺牲试剂或外部电压的情况下运行。明智地选择瀑布；微生物（在氢和二氧化碳存在下产生碳产物）、酞菁-卟啉基COF（从水中产生氢）、氧化钌（RuO2）（用于水氧化）和多噻吩（将阳极集成到ITO表面）将保证系统的高效率。成本效益和扩大规模的机会将导致原型的实际部署。

Artificial photosynthesis has though paved the way forward towards sustainable and clean energy, the progress has been often impeded by inefficient catalysis as well as costly and toxic materials. However, nature has been pursuing sunlight driven complicated chemical transformation with high selectivity and accuracy. Yet, such catalytic prowess is mostly restricted to naturally occurring reactions that are inefficient for practical application. Toward that end, integrating the strength of natural and artificial photosynthesis would capitalize on the most salient attributes of each component for efficient solar-to-chemical conversion. Herein, we have designed a covalent organic framework-bacteria biohybrid to catalyze carbon dioxide reduction reaction to acetate formation. A photo-sheet (COF|IO- ITO|polythiophenes:RuO2) combined with Sporomusa ovata bacteria would harness solar energy for selective acetate production using only carbon dioxide and water. The process would offer the much-desired sustainability as it will operate without sacrificial reagent or external voltage. The judicious selection of the cascades; microbes (produces carbon products in presence of hydrogen and carbon dioxide), phthalocyanine- porphyrin-based COF (produces hydrogen from water), Ruthenium oxide (RuO2) (for water oxidation) and polythiophenes (integrates anodes into ITO surface) would guarantee high efficiency of the system. The cost effectiveness and scale-up opportunities will lead to the practical deployment of a prototype.