Plasma functionalized MoSe2 for efficient nonenzymatic sensing of hydrogen peroxide in ultra-wide pH range  

作　　者：Yang Luo Donghai Wu Zehui Li Xiao‐Yan Li Yinghong Wu Shien‐Ping Feng Carlo Menon Houyang Chen Paul K.Chu 

机构地区：[1]Department of Physics,Department of Materials Science and Engineering,and Department of Biomedical Engineering,City University of Hong Kong,Hong Kong,China [2]Empa,Swiss Federal Laboratories for Materials Science and Technology,ETH Domain,Dübendorf,Switzerland [3]Centre for Water Technology and Policy,Department of Civil Engineering,The University of Hong Kong,Hong Kong,China [4]Henan Key Laboratory of Nanocomposites and Applications,Institute of Nanostructured Functional Materials,Huanghe S&T University,Zhengzhou,China [5]State Key Laboratory for Mesoscopic Physics,Collaborative Innovation Center of Quantum Matter,School of Physics,Peking University,Beijing,China [6]Biomedical and Mobile Health Technology Lab,Department of Health Sciences and Technology,ETH Zürich,Zürich,Switzerland [7]Department of Mechanical Engineering,The University of Hong Kong,Hong Kong,China [8]Department of Chemical and Biological Engineering,State University of New York at Buffalo,New York,USA

出　　处：《SmartMat》2022年第3期491-502,共12页智能材料（英文）

基　　金：Hong Kong Research Grants Council(RGC),Grant/Award Numbers:17210219,T21‐711/16‐R;China Postdoctoral Science Foundation,Grant/Award Number:2020M680178;City University of Hong Kong,Grant/Award Number:7005505。

摘　　要：Enzymatic sensors have inherent problems such as the low stability and limited pH range in industrial and biomedical applications and therefore,more efficient nonenzymatic sensors are highly desirable.Herein,plasmafunctionalized defective MoSe_(2)is prepared and studied as a highly efficient catalyst for electrochemical sensing of H_(2)O_(2).Experiments and theoretical computations show that the plasma-induced Se multi-vacancies and nitrogen dopants generate new active sites,expose more edge active surfaces,narrow the bandgap,and strengthen binding with the·OH intermediate,which imparts new fundamental knowledge about the roles of defects in catalysis.The defective MoSe_(2)-catalyzed sensor delivers competitive performance in hydrogen peroxide detection such as a low detection limit of 12.6 nmol/L,wide operational pH range of 1−13,good long-term stability,and high selectivity.The portable sensor produced by screen printing confirms the excellent commercial potential and in addition,the results not only reveal a novel concept to design and fabricate high-performance sensors for H_(2)_(O2)but also provide insights into the effectiveness of surface modification of diverse catalytic materials.

关 键 词：MoSe_(2) plasma functionalization electrochemical sensors hydrogen peroxides portable devices 

分 类 号：O64[理学—物理化学]