文献类型：期刊文献

中文题名：Al2O3 supported hybrid Pd-CeO2 colloidal spheres and its enhanced catalytic performances for methane combustion

英文题名：Al2O3 supported hybrid Pd-CeO2 colloidal spheres and its enhanced catalytic performances for methane combustion

作者：Xinwei Yang[1];Chenhao Du[2];Yanglong Guo[1];Yun Guo[1];Li Wang[1];Yunsong Wang[1];Wangcheng Zhan[1]

机构：[1]Key Laboratory for Advanced Materials and Research Institute of Industrial Catalysis,School of Chemistry and Molecular Engineering,East China University of Science and Technology,Shanghai 200237,China;[2]Sinopec Shanghai Research Institute of Petrochemical Technology,Shanghai 201208,China

年份：2019

卷号：37

期号：7

起止页码：714

中文期刊名：Journal of Rare Earths

外文期刊名：稀土学报（英文版）

收录：CSTPCD;;Scopus;CSCD:【CSCD2019_2020】；

基金：Project supported by the National Key Research and Development Program of China(2016YFC0204300);National Natural Science Foundation of China(21577034);Science and Technology Commission of Shanghai Municipality(16ZR1407900);Fundamental Research Funds for the Central Universities(222201717003)

语种：英文

中文关键词：CeO2;Interface;area;Methane;combustion;Stability;Rare;earths

外文关键词：CeO2;Interface area;Methane combustion;Stability;Rare earths

摘要：Fabrication of novel nano-catalyst with improved activity and stability has been a hot topic in heterogeneous catalysis. Herein a novel approach was designed to synthesize Pd-CeO2 colloidal assembled spheres(CASs) in one-pot fashion. The Pd clusters were encompassed by the CeO2 nanocrystals with a high dispersity. Based on this hybrid structure, the Pd/ceria interface area can be greatly improved. After Pd-CeO2 CASs was supported on γ-Al2O3, its catalytic activity for CH4 combustion was evaluated. The result shows that Al2O3 supported Pd-CeO2 CASs exhibits an improved catalytic activity and stability,compared to the Pd/CeO2 catalyst prepared by impregnation method. The results of several characterization techniques indicate that the enhanced catalytic activity of Al2O3 supported Pd-CeO2 CASs can be attributed to the more interfacial Pd-O-Ce species and the more surface active oxygen species.
Fabrication of novel nano-catalyst with improved activity and stability has been a hot topic in heterogeneous catalysis. Herein a novel approach was designed to synthesize Pd-CeO2 colloidal assembled spheres（CASs） in one-pot fashion. The Pd clusters were encompassed by the CeO2 nanocrystals with a high dispersity. Based on this hybrid structure, the Pd/ceria interface area can be greatly improved. After Pd-CeO2 CASs was supported on γ-Al2O3, its catalytic activity for CH4 combustion was evaluated. The result shows that Al2O3 supported Pd-CeO2 CASs exhibits an improved catalytic activity and stability,compared to the Pd/CeO2 catalyst prepared by impregnation method. The results of several characterization techniques indicate that the enhanced catalytic activity of Al2O3 supported Pd-CeO2 CASs can be attributed to the more interfacial Pd-O-Ce species and the more surface active oxygen species.