Mechanocatalysis of CO to CO_(2)on TiO_(2)surface controlled at atomic scale  

作　　者：Yuuki Adachi Robert Turanský Ján Brndiar Kamil Tokár Qiang Zhu Huan Fei Wen Yasuhiro Sugawara IvanŠtich Yan Jun Li 

机构地区：[1]Department of Applied Physics,Osaka University,2-1 Yamadaoka,Suita,Osaka 565-0871,Japan [2]Institute of Physics,Slovak Academy of Sciences,Bratislava 84511,Slovakia [3]Institute of Informatics,Slovak Academy of Sciences,Bratislava 84507,Slovakia [4]Faculty of Natural Sciences,University of Ss.Cyril and Methodius,Trnava 91701,Slovakia [5]Key Laboratory of Instrumentation Science and Dynamic Measurement,School of Instrument and Electronics,North University of China,Taiyuan 030051,China

出　　处：《Nano Research》2024年第7期5826-5834,共9页纳米研究（英文版）

基　　金：supported by a Grant-in-Aid for Scientific Research from Japan Society for the Promotion of Science(JSPS)from the Ministry of Education,Culture,Sports,Science,and Technology of Japan(Nos.JP16H06327,JP17H01061,A21J103560,and JP22H00282);supported by the International Joint Research Promotion Program of Osaka University(Nos.J171013014,J171013007,J181013004,J181013006,Ja1999001,Ja19990011,and A21J103560);JSPSthe National Natural Science Foundation of China(No.J191053055);supported by APVV-21-0272,VEGA-2/0070/21,VEGA-2/0125/20,VEGA-2/0131/23,and H2020 TREX GA No.952165 projects。

摘　　要：The common ways to activate a chemical reaction are by heat,electric current,or light.However,mechanochemistry,where the chemical reaction is activated by applied mechanical force,is less common and only poorly understood at the atomic scale.Here we report a tip-induced activation of chemical reaction of carbon monoxide to dioxide on oxidized rutile TiO_(2)(110)surface.The activation is studied by atomic force microscopy,Kelvin probe force microscopy under ultrahigh-vacuum and liquid nitrogen temperature conditions,and density functional theory(DFT)modeling.The reaction is inferred from hysteretic behavior of frequency shift signal further supported by vector force mapping of vertical and lateral forces needed to trigger the chemical reaction with torque motion of carbon monoxide towards an oxygen adatom.The reaction is found to proceed stochastically at very small tip-sample distances.Furthermore,the local contact potential difference reveals the atomic-scale charge redistribution in the reactants required to unlock the reaction.Our results open up new insights into the mechanochemistry on metal oxide surfaces at the atomic scale.

关 键 词：atomic resolution MECHANOCHEMISTRY atomic force microscopy Kelvin probe force microscopy density functional theory(DFT)simulation CO oxidation catalysis rutile TiO_(2)surface 

分 类 号：O64[理学—物理化学]