Facet-selective growth of MOF-on-MOF heterostructures enables etching-free synthesis of highly-open Co/N-doped carbon nanoframes for efficient catalysis

作     者：Yaohui Wu Liyu Chen Xianfeng Yang Yingwei Li Kui Shen 

作者机构：Guangdong Provincial Key Laboratory of Fuel Cell TechnologySchool of Chemistry and Chemical EngineeringSouth China University of TechnologyGuangzhou510640China State Key Laboratory of Pulp and Paper EngineeringSchool of Chemistry and Chemical EngineeringSouth China University of TechnologyGuangzhou510640China Analytical and Testing CentreSouth China University of TechnologyGuangzhou510640China 

出 版 物：《Science China Chemistry》 (中国科学（化学英文版）)

年 卷 期：2022年第65卷第12期

页      面：2450-2461页

核心收录：

学科分类：081705[工学-工业催化] 08[工学] 0817[工学-化学工程与技术] 

基　　金：supported by Guangdong Natural Science Funds for Distinguished Young Scholar(2018B030306050) the National Natural Science Foundation of China(22138003,21825802) the Natural Science Foundation of Guangdong Province(2017A030312005) 

主　　题：metal-organic frameworks etching-free synthesis highly-open nanoframes pyrolysis efficient catalysis 

摘      要：Highly-open nanoframe structures consisting of interconnected and exposed ridges are highly desirable for achieving efficient catalysis,but preparing them by a facile etching-free methodology is still a very daunting ***,we propose a novel metal-organic framework(MOF)-assisted and etching-free strategy for the construction of Co/N-doped carbon nanoframes with highly-open and precisely-controllable *** strategy is based on the face-selective epitaxial growth of ZIF-67 on the 36{110}facets of 72-facet ZIF-8 to form an unprecedented anisotropic ZIF-67-on-ZIF-8 heterostructure,which is subsequently pyrolyzed under Ar atmosphere to realize a solid-to-frame *** highly-open nanoframe structure enables the substrates to readily penetrate into the catalyst interior and thereby create additional exposed active sites,which together with the good mass transport,high atomic utilization and increased surface area are responsible for its remarkably enhanced catalytic activity for the biomass valorisation when compared with its solid and closed hollow *** study could shed valuable insights into the design and preparation of various highly-open nanoframes with abundant exposed active species by using an etching-free strategy for efficient catalysis and beyond.