Transformation of carbon dioxide to high value‐added chemicals becomes a significant challenge for clean energy studies. Here a stable and conductive covalent organic framework was developed for electrocatalytic carbon dioxide reduction to carbon monoxide in aqueous solution. The cobalt(II) phthalocyanine catalysts are topologically connected via robust phenazine linkage into a two‐dimensional tetragonal framework that is stable under boiling water, acid, or base conditions. The 2D lattice enables full π conjugation along x and y directions as well as π conduction along the z axis across the π columns. With these structural features, the electrocatalytic framework exhibits a faradaic efficiency of 96 %, an exceptional turnover number up to 320 000, and a long‐term turnover frequency of 11 412 hour⁻¹, which is a 32‐fold improvement over molecular catalyst. The combination of catalytic activity, selectivity, efficiency, and durability is desirable for clean energy production.

中文翻译：

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用于水中电催化还原二氧化碳的稳定且导电的金属酞菁骨架。

将二氧化碳转化为高附加值化学品成为清洁能源研究的重大挑战。在这里，开发了一种稳定且导电的共价有机骨架，用于将水溶液中的电催化二氧化碳还原为一氧化碳。钴（II）酞菁催化剂通过牢固的吩嗪键在拓扑上连接到二维四边形骨架中，该骨架在沸水，酸或碱条件下稳定。2D晶格可实现沿x和y方向的完全π共轭以及沿z的π导通横穿π列的轴线。具有这些结构特征，电催化框架的法拉第效率高达96％，特殊的周转率高达320000，长期周转频率为11412 hour ^-1，这比分子催化剂提高了32倍。催化活性，选择性，效率和耐久性的结合对于清洁能源的生产是理想的。