Tuning SMSI to stabilize metallic Pd species:A case study on Pd/TiO2 for HCHO oxidation

Chunying Wang ¹Xiaofeng Liu ²Jingyi Wang ¹Yaobin Li ¹Shaohua Xie ³Fudong Liu ³Changbin Zhang ⁴Yuming Zheng ²Wenpo Shan ¹Hong He⁵

扫码查看

作者信息

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;Zhejiang Key Laboratory of Urban Environmental Processes and Pollution Control,Ningbo Urban Environment Observation and Research Station,Chinese Academy of Sciences,Ningbo 315800,China
2. Center for Excellence in Regional Atmospheric Environment,Key Laboratory of Urban Pollutant Conversion,Institute of Urban Environment,Chinese Academy of Sciences,Xiamen 361021,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
5. Center for Excellence in Regional Atmospheric Environment,Key Laboratory of Urban Pollutant Conversion,Institute of Urban Environment,Chinese Academy of Sciences,Xiamen 361021,China;Zhejiang Key Laboratory of Urban Environmental Processes and Pollution Control,Ningbo Urban Environment Observation and Research Station,Chinese Academy of Sciences,Ningbo 315800,China;State Key Joint Laboratory of Environment Simulation and Pollution Control,Research Center for Eco-environmental Sciences,Chinese Academy of Scie
折叠

Abstract

Pretreatment of the carrier for supported catalysts can effectively improve the strong metal-support in-teraction(SMSI)and increase the dispersion of precious metals,which are critical to many important catalytic reactions.In this work,we tuned SMSI on Pd/TiO2 catalysts through inducing surface defects of TiO2 by pretreated with different atmospheres(H2/N2,N2,O2/N2)at the high temperature(800 ℃).Multiple characterization results illustrated that surface defects anchored Pd species and thus enhanced their dispersion.During reduction,Ti3+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/TiO2-800H2,with strongest MSI,displayed the best HCHO oxidation performance at low temperature(10 ℃).

Key words

Pd/TiO2/Surface defects/SMSI/Formaldehyde/Stability of Pd species

引用本文复制引用

基金项目

中国科学院青年创新促进会项目(2020310)

Science and Technology Planning Project of Xiamen City(3502Z20191021)

Science and Technology Innovation"2025"major program in Ningbo(2022Z028)

U.S.Department of Energy(DOE)Office of Science User Facility operated for the DOE Office of Science by Brookhaven National Labor(DE-SC0012704)

出版年

2024

中国化学快报(英文版)

中国化学会

中国化学快报(英文版)

CSTPCDCSCD

影响因子：0.771

ISSN：1001-8417

参考文献量53

段落导航