In-situ doping nickel single atoms in two-dimensional MXenes analogue support for room temperature NO_(2) sensing

查看全文 作　　者：Weiming [1,2]Chen;Peipei [1,2]Li;Jia [1,2]Yu;Peixin [3]Cui;Xiaohu [4]Yu;Weiguo [1,2]Song;Changyan [1,2]Cao

机构地区：[1]Beijing National Laboratory for Molecular Sciences,CAS Research/Education Center for Excellence in Molecular Sciences,Laboratory of Molecular Nanostructures and Nanotechnology,Institute of Chemistry,Chinese Academy of Sciences,Beijing 100190,China;[2]School of Chemical Sciences,University of Chinese Academy of Sciences,Beijing 100049,China;[3]Key Laboratory of Soil Environment and Pollution Remediation,Institute of Soil Science,Chinese Academy of Sciences,Nanjing 210008,China;[4]Institute of Theoretical and Computational Chemistry,Shaanxi Key Laboratory of Catalysis,School of Chemical&Environment Sciences,Shaanxi University of Technology,Hanzhong 723000,China

出　　处：《Nano Research》索引2022年第15卷第10期,共10页

基　　金：National Key R&D Program of China(No.2018YFA0208504);the National Natural Science Foundation of China(Nos.21932006 and 92161112);the National Science Basic Research Program of Shaanxi(Nos.S2020-JC-WT-0001 and 2021JCW-20);the Youth Innovation Promotion Association of CAS(No.Y2017049)for financial support. 摘　　要：MXenes are promising supports for anchoring metal single atoms due to their versatile composition,well-defined nanostructures,and suitable conductivity.However,metal single atoms are usually coordinated with surface terminal groups(-O,-OH,-Cl,etc.)of MXenes via conventional wet-impregnation,resulting in limited electronic structure modification.Through a NiCl2 molten salt etching method,we observed that Ni single atoms could be in-situ doped in the lattice of MXenes analogue TiC_(0.5)N_(0.5) support(denoted as Ni1/TiC0.5N0.5),resulting in much larger charge transfer from Ni atoms to adjacent Ti atoms,and thus increasing the electronic density of these Ti atoms.When used for NO_(2) sensing,Ni_(1)/TiC_(0.5)N_(0.5) exhibited excellent response sensitivity(ultra-low limit of detection~10 ppb),selectivity,and good stability at room temperature.This study provides an effective strategy for producing MXenes analogue supported metal single atoms for potential application in gas sensing. 关键词：MXenes single atom NO_(2) SENSING molten salt

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In-situ doping nickel single atoms in two-dimensional MXenes analogue support for room temperature NO_(2) sensing

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