Tuning SMSI to stabilize metallic Pd species:A case study on Pd/TiO_(2) for HCHO oxidation  

作　　者：Chunying Wang Xiaofeng Liu Jingyi Wang Yaobin Li Shaohua Xie Fudong Liu Changbin Zhang Yuming Zheng Wenpo Shan Hong He 

机构地区：[1]Center for Excellence in Regional Atmospheric Environment,Key Laboratory of Urban Pollutant Conversion,Institute of Urban Environment,Chinese Academy of Sciences,Xiamen 361021,China [2]Zhejiang Key Laboratory of Urban Environmental Processes and Pollution Control,Ningbo Urban Environment Observation and Research Station,Chinese Academy of Sciences,Ningbo 315800,China [3]Department of Civil,Environmental,and Construction Engineering(CECE),Catalysis Cluster for Renewable Energy and Chemical Transformations(REACT),Nano Science Technology Center(NSTC),University of Central Florida,Orlando,FL 32816,USA [4]State Key Joint Laboratory of Environment Simulation and Pollution Control,Research Center for Eco-environmental Sciences,Chinese Academy of Sciences,Beijing 100085,China

出　　处：《Chinese Chemical Letters》2024年第3期162-166,共5页中国化学快报（英文版）

基　　金：supported by the Youth Innovation Promotion Association,CAS(No.2020310);the Science and Technology Planning Project of Xiamen City(No.3502Z20191021);the Science and Technology Innovation“2025”major program in Ningbo(No.2022Z028)。

摘　　要：Pretreatment of the carrier for supported catalysts can effectively improve the strong metal-support interaction(SMSI)and increase the dispersion of precious metals,which are critical to many important catalytic reactions.In this work,we tuned SMSI on Pd/TiO_(2)catalysts through inducing surface defects of TiO_(2)by pretreated with different atmospheres(H_(2)/N_(2),N_(2),O_(2)/N_(2))at the high temperature(800℃).Multiple characterization results illustrated that surface defects anchored Pd species and thus enhanced their dispersion.During reduction,Ti^(3+)species formed and transferred onto the metallic Pd species and then induced SMSI,which effectively stabilize Pd species in the metallic state.The stronger MSI,the more stability of Pd species.As a case,Pd/TiO_(2)–800H_(2),with strongest MSI,displayed the best HCHO oxidation performance at low temperature(10℃).

关 键 词：Pd/TiO_(2) Surface defects SMSI FORMALDEHYDE Stability of Pd species 

分 类 号：O621.251[理学—有机化学] O643.36[理学—化学]