文献类型：期刊文献

英文题名：Insight into the roles of Pd state and CeO2 property in C3H8 catalytic oxidation on Pd/CeO2

作者：Liu, Yenan[1,2];Cai, Yafeng[1,2];Tang, Xuan[1,2];Shao, Chuntao[1,2];You, Yang[1,2];Wang, Li[1,2];Zhan, Wangcheng[1,2];Guo, Yanglong[1,2];Zhao, YunKun[3];Guo, Yun[1,2]

机构：[1]East China Univ Sci & Technol, Sch Chem & Mol Engn, Key Lab Adv Mat, Shanghai 200237, Peoples R China;[2]East China Univ Sci & Technol, Res Inst Ind Catalysis, Sch Chem & Mol Engn, Shanghai 200237, Peoples R China;[3]Kunming Inst Precious Met, State Key Lab Adv Technol Comprehens Utilizat Plat, Kunming 650106, Peoples R China

年份：2022

卷号：605

外文期刊名：APPLIED SURFACE SCIENCE

收录：;EI(收录号：20223912784863);WOS:【SCI-EXPANDED(收录号:WOS:000857540400002)】；

基金：This project was supported financially by the National Natural Science Foundation of China (U21A20326, 21976057, 21922602, and 22076047) , the Shanghai Science and Technology Innovation Plan Program (19DZ1208000) , the fund of the State Key Laboratory of Advanced Technologies for Comprehensive Utilization of Platinum Metals (SKL-SPM-202018) and Fundamental Research Funds for the Central Universities.

语种：英文

外文关键词：CeO2; PdO; PdxCe1-xO2-s; C3H8 oxidation

摘要：Propane oxidation is a key reaction in the three-way catalytic reaction. The dispersion state of Pd species and property of CeO2 have significant impacts on the C3H8 oxidation over Pd/CeO2 catalyst via altering the activation pathways of C3H8. Herein, Pd/CeO2 catalysts with highly dispersed Pd species (Pd/CeO2-IWI) and uniform PdO nanoparticles (4.3 +/- 0.3 nm) (Pd/CeO2-EG) were prepared, respectively. The highly dispersed Pd species on Pd/ CeO2-IWI promoted Pd entering the lattice to form PdxCe1-xO2-sigma solid solution through strong Pd-CeO2 interaction, while PdO nanoparticles were the main existing form on Pd/CeO2-EG. The results showed that C3H8 was adsorbed and activated to form acrylate on PdxCe1-xO2-sigma, while C3H8 preferred to generate acetone on PdO. However, the main surface intermediates were converted to acetate and formate at the elevated reaction temperature. Compared with PdxCe1-xO2-sigma, PdO was more favorable for the rapid oxidative decomposition of acetate to formate, which facilitated the C3H8 oxidation activity. Meanwhile, the property of CeO2 could also influence the C3H8 oxidation activity through the accumulation of formate and carbonate. In which, Pd/CeO2(1 0 0 0)-EG with the most PdO species and the lowest accumulation of surface formate/carbonate performed the highest C3H8 oxidation activity.