共价三嗪框架负载钌分子催化剂用于高效光催化析氧反应
Covalent triazine frameworks with Ru molecular catalyst for efficient photocatalytic oxygen evolution reaction
孙瑞雪 1胡勋亮 1舒畅 1郭彦彤 1王笑颜 1谭必恩1
作者信息
- 1. 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,Wuhan 430074,China
- 折叠
摘要
由于析氧反应的内在动力学缓慢,开发高效的光催化析氧反应催化剂,以利用太阳能进行光催化分解水产氧,面临着巨大的挑战.本研究设计了一种新型的"主-客体"光催化系统,通过简单的预负载将单位点钌(Ru)分子催化剂引入共价三嗪框架(CTFs)的孔道内.其中,CTFs作为光敏剂和光催化载体,单核钌配合物Ru-bda-Isoq作为分子水氧化催化剂.在可见光照射下,Ru-bda-Isoq@CTF-Bph在5 h内平均析氧速率达到2308 μmol g-1 h-1,其性能超过了大多数有机光催化剂.同时,研究还发现多孔光敏剂与分子催化剂之间的结构匹配起着非常关键的作用.该体系具有广泛的适用性,这一策略有助于高效水氧化光催化系统的设计.
Abstract
The development of efficient oxygen evolution reaction(OER)photocatalysts to enable solar-driven photo-catalytic water splitting into oxygen has been tremendously challenging,primarily due to the low oxygen evolution effi-ciency caused by intrinsically sluggish kinetics.Herein,we report the design of a novel"host-guest"photocatalytic system that incorporates the molecular ruthenium(Ru)catalyst into covalent triazine framework(CTF)channels through a facile immersion treatment.The CTF acts as the photosensitizer and support material,while the mononuclear Ru-based complex Ru-bda-Isoq acts as a molecular water-oxidation catalyst.Remarkably,Ru-bda-Isoq@CTF-Bph achieves an excellent oxygen evolution rate of up to 2308 μmol g-1 h-1 under visible light irradiation for 5 h.The structural matching between the porous photosensitizer and molecular catalyst is found to play a very critical role in achieving the high performance,and the specificity and universality of this system are also highlighted.This strategy provides valuable insights into the design of ef-ficient water oxidation photocatalytic systems.
关键词
covalent triazine frameworks(CTFs)/molecular wa-ter-oxidation catalyst/Ru-bda-Isoq/photocatalytic oxygen evo-lutionKey words
covalent triazine frameworks(CTFs)/molecular wa-ter-oxidation catalyst/Ru-bda-Isoq/photocatalytic oxygen evo-lution引用本文复制引用
基金项目
Analysis and Testing Center,Huazhong University of Science and Technology()
National Natural Science Foundation of China(22161142005)
National Natural Science Foundation of China(21975086)
Science and Technology Department of Hubei Province(2019CFA008)
出版年
2024
NETL
NSTL
万方数据