Two-Dimensional Metal-Organic Frameworks with Unique Oriented Layers for Oxygen Reduction Reaction:Tailoring the Activity through Exposed Crystal Facets

查看全文 作　　者：Yanzhi [1]Wang;Tu [2]Sun;Amir [3]H.B.Mostaghimi;Tiago [3]J.Goncalves;Zuozhong [1]Liang;Yuye [4]Zhou;Wei [1]Zhang;Zhehao [5]Huang;Yanhang [2]Ma;Rui [1]Cao;Samira [3]Siahrostami;Haoquan [1]Zheng

机构地区：[1]Key Laboratory of Applied Surface and Colloid Chemistry,Ministry of Education,School of Chemistry and Chemical Engineering,Shaanxi Normal University,Xi’an 710119;[2]School of Physical Science and Technology,ShanghaiTech University,Shanghai 201210;[3]Department of Chemistry,University of Calgary,Calgary,AB T2N 1N4;[4]School of Engineering Sciences in Chemistry,Biotechnology,and Health,Department of Chemistry,Division of Applied Physical Chemistry,Analytical Chemistry,KTH Royal Institute of Technology,SE-10691 Stockholm;[5]Department of Materials and Environmental Chemistry,Stockholm University,SE-10691 Stockholm

出　　处：《CCS Chemistry》索引2022年第4卷第5期,共10页

基　　金：the support from the National Natural Science Foundation of China(grant nos.21975148,21875149,21835002,21875140,and 21773146);the Fundamental Research Funds for the Central Universities;the Research Funds of Shaanxi Normal University,Shanghai Natural Science Fund(no.17ZR1418600);ChEM,SPST of ShanghaiTech University(no.EM02161943);the Swedish Research Council Formas(no.2020-00831,Z.H.);the University of Calgary’s Canada First Research Excellence Fund Program,the Global Research Initiative in Sustainable Low Carbon Unconventional Resources. 摘　　要：As one of the most important families of porous materials,metal–organic frameworks(MOFs)have well-defined atomic structures.This provides ideal models for investigating and understanding the relationships between structures and catalytic activities at the molecular level.However,the active sites on the edges of two-dimensional(2D)MOFs have rarely been studied,as they are less exposed to the surfaces.Here,for the first time,we synthesized and observed that the 2D layers could align perpendicular to the surface of a 2D zeolitic imidazolate framework L(ZIF-L)with a leaf-like morphology.Owing to this unique orientation,the active sites on the edges of the 2D crystal structure could mostly be exposed to the surfaces.Interestingly,when another layer of ZIF-L-Co was grown heteroepitaxially onto ZIF-L-Zn(ZIF-L-Zn@ZIF-L-Co),the two layers shared a common b axis but rotated by 90°in the ac plane.This demonstrated that we could control exposed facets of the 2D MOFs.The ZIF-L-Co with more exposed edge active sites exhibited high electrocatalytic activity for oxygen reduction reaction.This work provides a new concept of designing unique oriented layers in 2D MOFs to expose more edge-active sites for efficient electrocatalysis. 关键词：unique oriented layer two-dimensional material metal-organic framework ELECTROCATALYST oxygen reduction reaction

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Two-Dimensional Metal-Organic Frameworks with Unique Oriented Layers for Oxygen Reduction Reaction:Tailoring the Activity through Exposed Crystal Facets

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