Nitrogen-skinned carbon nanocone enables non-dynamic electrochemistry of individual metal particles  

作　　者：Chen Liu Jianan Xu Han Gao Min Zhou Lehui Lu 

机构地区：[1]State Key Laboratory of Electroanalytical Chemistry,Changchun Institute of Applied Chemistry,Chinese Academy of Sciences,Changchun 130000,China [2]University of Science and Technology of China,Hefei 230026,China

出　　处：《Science China Chemistry》2022年第10期2031-2037,共7页中国科学（化学英文版）

基　　金：supported by the National Natural Science Foundation of China (21721003,21635007);the Instrument Developing Project of the Chinese Academy of Sciences (YJKYYQ20210003);the Natural Science Foundation of Jilin Province(20210101402JC)

摘　　要：Nano-impact electrochemistry is an efficient way to probe the physical and chemical properties of individual particles.Unfortunately,limited by the weak adsorption between particles and a microelectrode(ME),the particle collision events evolve randomly to be elastic or inelastic.These events occur intermittently to produce unmarked transient signal sets that seriously interfere with single particle measurement.Here,we report a nitrogen-skinned carbon nanocone electrode(NS-CNCE) to enhance its adsorption capacity greatly towards metal particles and thus realize non-dynamic(i.e.,inelastic impacts) single particle analysis.The surface of NS-CNCEs characteristic of excellent adhesion,smoothness,and conductivity can effectively capture the landing metal particles to form a stable contact for efficient electronic communication.Using superior NS-CNCEs,we investigated electrochemical oxidation of Ag(or Au) particles and electrocatalytic amplification of Pt particles,respectively,under non-dynamic electrochemistry.The determined particle size is highly consistent with the physical characterization.Statistical analysis of transient signals confirms the strong adhesion of NS-CNCEs to metal particles,which is also in line with the prediction of a particle-electrode adsorption energy model.The proposed strategy has effectively solved the major challenge of general single metal particle collision analysis.

关 键 词：non-dynamic electrochemistry inelastic impacts single particle collisions nitrogen-skinned carbon 

分 类 号：TB383.1[一般工业技术—材料科学与工程]