Covalent Organic Framework-Bacteria Cascades for Sustainable Carbon Dioxide Reduction

虽然人工光合作用为可持续和清洁能源铺平了道路，但这一进展往往受到低效催化以及昂贵和有毒材料的阻碍。然而，自然界一直在追求阳光驱动的高选择性和准确性的复杂化学转化。然而，这种催化能力主要限于自然发生的反应，实际应用效率低下。为此，整合自然和人工光合作用的力量将利用每个组件的最显著属性进行有效的太阳能到化学转化。在此，我们设计了一种共价有机骨架-细菌生物复合体催化二氧化碳还原生成乙酸。一张照片（COF| IO- ITO|聚噻吩：RuO 2）与卵孢菌（Sporomusa ovata）细菌结合，将利用太阳能仅使用二氧化碳和水进行选择性乙酸盐生产。该过程将提供非常期望的可持续性，因为它将在没有牺牲试剂或外部电压的情况下操作。级联的明智选择;微生物（在氢气和二氧化碳存在下产生碳产物）、基于酞菁-卟啉的COF（从水中产生氢气）、氧化钌（RuO 2）（用于水氧化）和聚噻吩（将阳极整合到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.