Cerium based shells with palladium cores encapsulated: an efficient catalyst for carbon monoxide oxidation

被引：10

作者：

Wang Miao ^{[1
]}

Shen Meiqing ^{[1
,2
,3
]}

Wang Jianqiang ^{[1
]}

Wei Guangxi ^{[1
]}

Li Hang ^{[1
]}

Wang Jun ^{[1
]}

机构：

[1] Tianjin Univ, Sch Chem Engn & Technol, Key Lab Green Chem Technol, State Educ Minist, Tianjin 300072, Peoples R China

[2] Tianjin Univ, State Key Lab Engines, Tianjin 300072, Peoples R China

[3] Collaborat Innovat Ctr Chem Sci & Engn, Tianjin 300072, Peoples R China

来源：

JOURNAL OF RARE EARTHS | 2014年 / 32卷 / 12期

关键词：

Pd@CeO2 core-shell catalyst; Zr modification; low-temperature CO oxidation activity; oxygen vacancies; rare earths; OXYGEN STORAGE; CO; 3-WAY; PD; COMBUSTION; DISPERSION; CEO2;

D O I：

10.1016/S1002-0721(14)60191-5

中图分类号：

O69 [应用化学];

学科分类号：

081704 ;

摘要：

Pd@Zr/CeO2 core-shell catalyst prepared by hydrothermal method was applied in CO oxidation reaction, exhibiting high CO oxidation activity at low temperature. XRD (X-ray diffraction) analysis demonstrated that the remarkable enhancement of catalytic performance was found to depend on the presence of more oxygen vacancies in the core-shell structure, which contributed higher content of and ready release of active oxygen species at low temperature, confirmed by H-2-TPR (temperature programed reduction) results. Interestingly, introducing a small amount of zirconium (0.5 wt.%) exhibited a significant improvement of catalytic activity because the introduction of Zr further improved the amount of crystal defects and promoted the migration of oxygen species.

引用

页码：1114 / 1119

页数：6

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