Liu Manying, Wang Xueqing, Liu Jing, Wang Kewei, Jin Shangbin, Tan Bien
Key Laboratory of Material Chemistry for Energy Conversion and Storage, Ministry of Education, Hubei Key Laboratory of Material Chemistry and Service Failure, School of Chemistry and Chemical Engineering, Huazhong University of Science and Technology, Luoyu Road No. 1037, Wuhan 430074, China.
Department of Chemistry and Materials Innovation Factory, University of Liverpool, Crown Street, Liverpool L69 7ZD, U.K.
ACS Appl Mater Interfaces. 2020 Mar 18;12(11):12774-12782. doi: 10.1021/acsami.9b21903. Epub 2020 Mar 3.
Abundant pyridinic nitrogen in the triazine units of covalent triazine frameworks (CTFs) is very useful in various heterogeneous catalysis reactions. Herein, a tunable CTF platform with the same porous structure was designed and synthesized to study the interaction between palladium/platinum (Pd/Pt) and pyridinic nitrogen of CTFs. The smaller Pd nanoparticles were formed because of the stronger interaction between Pd and pyridinic nitrogen atoms of CTFs, which is more beneficial for the separation of photogenerated electron-hole pairs. Moreover, the stronger interaction between the Pd nanoparticles and CTFs is also beneficial for photoelectron transfer. Under the same conditions, the hydrogen evolution rate of 1 wt % Pd@CTF-HC6 is up to 11 times more than that of 1 wt % Pt@CTF-HC6. The hydrogen evolution rate of 1 wt % Pd@CTF-N approaches 10 556 μmol h g and is about 5 times more than that of 1 wt % Pt@CTF-N.
共价三嗪框架（CTF）的三嗪单元中大量的吡啶型氮在各种多相催化反应中非常有用。在此，设计并合成了具有相同多孔结构的可调谐CTF平台，以研究钯/铂（Pd/Pt）与CTF的吡啶型氮之间的相互作用。由于Pd与CTF的吡啶型氮原子之间的相互作用更强，形成了更小的Pd纳米颗粒，这更有利于光生电子-空穴对的分离。此外，Pd纳米颗粒与CTF之间更强的相互作用也有利于光电子转移。在相同条件下，1 wt% Pd@CTF-HC6的析氢速率比1 wt% Pt@CTF-HC6高11倍。1 wt% Pd@CTF-N的析氢速率接近10556 μmol h g，约为1 wt% Pt@CTF-N的5倍。
