化学
催化作用
选择性
共价键
共价有机骨架
组合化学
吸附
酞菁
电催化剂
氧化还原
纳米技术
化学工程
光化学
电化学
材料科学
有机化学
电极
物理化学
工程类
作者
Tao Xie,Shuai Chen,NULL AUTHOR_ID,NULL AUTHOR_ID,Ning Huang,Yujie Xiong
标识
DOI:10.1002/anie.202411188
摘要
Electrocatalytic carbon dioxide reduction reaction (CO2RR) is an effective way of converting CO2 into value‐added products using renewable energy, whose activity and selectivity can be in principle maneuvered by tuning the microenvironment near catalytic sites. Here, we demonstrate a strategy for tuning the microenvironment of CO2RR by learning from the natural chlorophyll and heme. Specifically, the conductive covalent organic frameworks (COFs) linked by piperazine serve as versatile supports for single‐atom catalysts (SACs), and the pendant groups modified on the COFs can be readily tailored to offer different push‐pull electronic effects for tunable microenvironment. As a result, while all the COFs exhibit high chemical structure stability under harsh conditions and good conductivity, the addition of ‐CH2NH2 can greatly enhance the activity and selectivity of CO2RR. As proven by experimental characterization and theoretical simulation, the electron‐donating group (‐CH2NH2) not only reduces the surface work function of COF, but also improves the adsorption energy of the key intermediate *COOH, compared with the COFs with electron‐withdrawing groups (‐CN, ‐COOH) near the active sites. This work provides insights into the microenvironment modulation of CO2RR electrocatalysts at the molecular level.
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