二氧化碳
催化作用
水溶液
二氧化碳电化学还原
金属有机骨架
氧合物
钴
电化学
碳纤维
无机化学
化学
材料科学
化学工程
电极
法拉第效率
一氧化碳
有机化学
复合材料
复合数
物理化学
吸附
工程类
作者
Ning Huang,Ka Hung Lee,Yunfei Yan,Xiaoyi Xu,Stefan Irle,Qiuhong Jiang,Donglin Jiang
标识
DOI:10.1002/anie.202005274
摘要
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.
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