高稳定二维联咔唑sp^(2)碳共轭共价有机框架材料用于高效电催化氧还原  

Highly-Stable Two-Dimensional Bicarbazole-based sp2-Carbon-conjugated Covalent Organic Framework for Efficient Electrocatalytic Oxygen Reduction

作　　者：刘建川 李翠艳 刘耀祖 王钰杰 方千荣[1] Liu Jianchuan;Li Cuiyan;Liu Yaozu;Wang Yujie;Fang Qianrong(State Key Laboratory of Inorganic Synthesis and Preparative Chemistry,College of Chemistry,Jilin University,Changchun 130012)

机构地区：[1]吉林大学化学学院无机合成与制备化学国家重点实验室,长春130012

出　　处：《化学学报》2023年第8期884-890,共7页Acta Chimica Sinica

基　　金：国家重点研发计划(Nos.2022YFB3704900,2021YFF0500500);国家自然科学基金(Nos.22025504,21621001和22105082);中石化石油化工科学研究院资助。

摘　　要：化石燃料的过度消耗和环境污染已成为全球面临的主要问题,如何合理开发利用新能源成为我国能源战略中的主要目标.新型能量转换技术是促进新能源发展的关键.目前,以金属-空气电池、燃料电池等为主导的新型清洁电化学能量转换技术在转换效率、经济性等方面均取得了重大突破,极具产业化应用前景.开发高效、稳定、低成本的电化学催化剂是促进清洁能转换装置发展的关键.在此,报道了一种基于联咔唑构筑单元合成的高稳定sp^(2)键型的共价有机框架材料(JUC-557)用于燃料电池阴极氧还原反应(ORR).该材料具有高比表面积、高稳定性等优点,同时也表现出高效的ORR催化性能和组装锌-空电池的应用潜力.此外,该材料相比于贵金属催化剂,也具有低成本、低污染、结构明确、原子和结构精度可控等优势.本研究为构建异质原子高效非金属电催化剂提供了一种新思路.With the extensive utilization of fossil fuels in industrial development,the energy crisis and environmental issues have become crucial challenges for current scientific development.The development of sustainable and clean energy is of great importance for sustainable human progress.Fuel and metal-air batteries have emerged as promising alternatives to fossil fuels,providing environmentally friendly and sustainable clean energy.Improving the efficiency of the oxygen reduction reaction(ORR)is crucial for energy generation and storage processes of batteries.Therefore,the development of efficient and stable ORR electrocatalysts is a key task to improve battery performance.Noble metal-based materials are known for their excellent ORR catalytic performance,but their high cost and instability have limited their applications.Hence,it is essential to develop low-cost,low-pollution,and high-efficiency electrocatalysts as noble metal-based alternatives.Transition-metal(TM)-based materials,metal alloys,and metal-free carbon nanomaterials have been reported as alternatives,but their properties are not as good as those of noble metal-based materials.In addition,their complex processes and difficult-to-identify active sites make it challenging to elucidate the intrinsic mechanisms.Rational design and precise synthesis of electrochemical catalysts are critical strategies.Covalent organic frameworks(COFs)have several advantages,including high crystallinity,high specific surface area,high stability,and regular pore channels.Besides,the construction of COFs has the advantages of pre-design and precise synthesis.Reasonable design and construction unit is an important strategy to realize the functional application of COFs materials.Many new products with structural characteristics have been reported since the introduction of COFs,and they have demonstrated excellent performance in several fields.In this study,we investigated the application of a highly stable sp2-carbon-linked COF(JUC-557)based on a bicarbazole building block for el

关 键 词：多孔材料 共价有机框架 电催化 氧化还原 非金属催化剂 

分 类 号：O643.36[理学—物理化学]