Regulating the electronic structure of Ir single atoms by ZrO_(2)nanoparticles for enhanced catalytic oxidation of formaldehyde at room temperature

作     者：Shiqi Peng Yongfang Rao Tan Li Yufei Zhang Jun-ji Cao Shuncheng Lee Yu Huang Shiqi Peng;Yongfang Rao;Tan Li;Yufei Zhang;Jun-ji Cao;Shuncheng Lee;Yu Huang

作者机构：Key Laboratory of Aerosol Chemistry&PhysicsState Key Laboratory of Loess and Quaternary Geology(SKLLQG)Institute of Earth EnvironmentChinese Academy of Sciences(CAS)Xi’an 710061China School of Human Settlements and Civil EngineeringXi’an Jiaotong UniversityXi’an 710049China Department of Environmental Science and EngineeringXi’an Jiaotong UniversityXi’an 710049China Faculty of Chemical EngineeringKunming University of Science and TechnologyKunming 650500China School of Environment and EnergySouth China University of TechnologyGuangzhou 51006China School of Environmental and Municipal EngineeringXi’an University of Architecture and TechnologyXi’an 710055China Institute of Atmospheric PhysicsChinese Academy of SciencesBeijing 100190China Department of Civil and Environmental EngineeringThe Hong Kong Polytechnic UniversityHong KongChina CAS Center for Excellence in Quaternary Science and Global ChangeXi’an 710061China 

出 版 物：《Chinese Chemical Letters》 (中国化学快报（英文版）)

年 卷 期：2024年第35卷第7期

页      面：200-205页

核心收录：

学科分类：081705[工学-工业催化] 07[理学] 08[工学] 0817[工学-化学工程与技术] 070602[理学-大气物理学与大气环境] 0706[理学-大气科学] 

基　　金：supported by the Strategic Priority Research Program of the Chinese Academy of Sciences,China(Nos.XDA23010300 and XDA23010000) National Science Foundation of China,China(Nos.52200137 and 21725102) the Plan for“National Youth Talents” GuangDong Basic and Applied Basic Research Foundation(No.2021A1515110427) 

主　　题：ZrO_(2)nanoparticles Ir single atoms Electronic structure Formaldehyde Catalytic oxidation 

摘      要：Developing low-loading single-atom catalysts with superior catalytic activity and selectivity in formaldehyde(HCHO)oxidation at room temperature remains ***,ZrO_(2)nanoparticles coupled low-loading Ir single atoms in N-doped carbon(Ir_(1)-N-C/ZrO_(2))was *** optimal Ir_(1)-N-C/ZrO_(2)with 0.25 wt%Ir loading delivers the high HCHO removal and conversion efficiency(95%)at 20℃,which is higher than that over Ir_(1)-N-C with the same Ir *** specific rate can reach 1285.6 mmol gIr^(-1)h^(-1),surpassing the Ir based catalysts reported to *** functional theory calculation results and electron spin resonance spectra indicate that the introduction of Zr O_(2)nanoparticles modulate the electronic structure of the Ir single atoms,promoting O_(2)activation to·O_(2)^(–).Moreover,the Ir-C-Zr channel is favorable for the dissociation of·O_(2)^(–)to active oxygen atom(*O),and further accelerates the transformation of HCHO and intermediates(dioxymethylene and formates)to CO_(2)and H_(2)*** work provides a facile strategy to design low-loading single-atom catalysts with high catalytic activity toward HCHO oxidation.