氟
三嗪
共价键
路易斯酸
催化作用
化学
聚合
高分子化学
无机化学
有机化学
聚合物
作者
Xian Suo,Fengtao Zhang,Zhenzhen Yang,Hao Chen,Tao Wang,Zongyu Wang,Takamichi Kobayashi,Chi‐Linh Do‐Thanh,D.V. Maltsev,Zhimin Liu,Sheng Dai
标识
DOI:10.1002/ange.202109342
摘要
Abstract Perfluorinated covalent triazine frameworks (F‐CTFs) have shown unique features and attractive performance in separation and catalysis. However, state‐of‐the‐art F‐CTFs synthesized via the ZnCl 2 ‐promoted procedure have quite low fluorine contents due to C−F bond cleavage induced by chloride (a Lewis base) and the harsh conditions deployed (400–700 °C). Fabricating F‐CTFs with high fluorine contents (>30 wt %) remains challenging. Herein, we present a low‐temperature ionothermal approach (275 °C) to prepare F‐CTFs, which is achieved via polymerization of tetrafluoroterephthalonitrile (TFPN) over the Lewis superacids, e.g., zinc triflimide [Zn(NTf 2 ) 2 ] without side reactions. With low catalyst loading (equimolar), F‐CTFs are afforded with high fluorine content (31 wt %), surface area up to 367 m 2 g −1 , and micropores around 1.1 nm. The highly hydrophobic F‐CTF‐1 exhibits good capability to boost electroreduction of CO 2 to CO, with faradaic efficiency of 95.7 % at −0.8 V and high current density (−141 mA cm −2 ) surpassing most of the metal‐free electrocatalysts.
科研通智能强力驱动
Strongly Powered by AbleSci AI