阳离子聚合
选择性
共价有机骨架
电化学
吸附
金属有机骨架
催化作用
化学工程
材料科学
共价键
电导率
纳米颗粒
电催化剂
化学
电极
无机化学
纳米技术
有机化学
高分子化学
物理化学
工程类
作者
Fentahun Wondu Dagnaw,Karim Harrath,Tao Zheng,Xudong Wu,Yuren Liu,Rui‐Qi Li,Luo‐Han Xie,Jia Li,Xuezhong He,Qing‐Xiao Tong,Jing‐Xin Jian
标识
DOI:10.1002/advs.202408152
摘要
Abstract Coupling carbon capture with electrocatalytic carbon dioxide reduction (CO 2 R) to yield high‐value chemicals presents an appealing avenue for combating climate change, yet achieving highly selective electrocatalysts remains a significant challenge. Herein, two molecularly woven covalent organic frameworks (COFs) are designed, namely CuCOF and CuCOF + , with copper(I)‐bisphenanthroline complexes as building blocks. The metal–organic helical structure unit made the CuCOF and CuCOF + present woven patterns, and their ordered pore structures and cationic properties enhanced their CO 2 adsorption and good conductivity, which is confirmed by gas adsorption and electrochemical analysis. In the electrocatalytic CO 2 R measurements, CuCOF + decorated with extra ethyl groups exhibit a main CO product with selectivity of 57.81%, outperforming the CuCOF with 42.92% CO at the same applied potential of 0.8 V RHE . After loading Pd nanoparticles, CuCOF‐Pd and CuCOF + ‐Pd performed increased CO selectivity up to 84.97% and 95.45%, respectively. Combining the DFT theoretical calculations and experimental measurements, it is assumed that the molecularly woven cationic COF provides a catalytic microenvironment for CO 2 R and ensures efficient charge transfer from the electrode to the catalytic center, thereby achieving high electrocatalytic activity and selectivity. The present work significantly advances the practice of cationic COFs in real‐time CO 2 capture and highly selective conversion to value‐added chemicals.
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