A high-surface-area La-Ce-Mn mixed oxide with enhanced activity for CO and C3H8 oxidation

被引：20

作者：

Zhao, Baohuai ^{[1
]}

Ran, Rui ^{[1
]}

Sun, Li ^{[1
]}

Yang, Zesheng ^{[1
]}

Wu, Xiaodong ^{[1
]}

Weng, Duan ^{[1
,2
]}

机构：

[1] Tsinghua Univ, Sch Mat Sci & Engn, State Key Lab New Ceram & Fine Proc, Beijing 100084, Peoples R China

[2] Tsinghua Univ, Sch Mat Sci & Engn, Key Lab Adv Mat MOE, Beijing 100084, Peoples R China

来源：

CATALYSIS COMMUNICATIONS | 2018年 / 105卷

关键词：

Perovskite; Ce doping; Acid etching; Reactive oxygen; Low-temperature oxidation; PROPANE TOTAL OXIDATION; CATALYTIC PERFORMANCE; METHANE COMBUSTION; LAMNO3; PEROVSKITE; LOW-TEMPERATURE; VINYL-CHLORIDE; NO OXIDATION; SUBSTITUTION; TOLUENE; NI;

D O I：

10.1016/j.catcom.2017.11.007

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

A high-surface-area La-Ce-Mn mixed oxide was synthesized by citrate method, with further acid etching to dissolve the La3+ ions in the lattice. The acid etching process efficiently improved the specific surface area, increased the ratios of Mn4+ /Mnn+, Ce3+/Cen+, O-alpha/O-tot, and enhanced the oxygen mobility of the catalyst, which were responsible for the superior catalytic performance. Compared to the pristine La8.8Ce0.2MnO3 + delta catalyst, the etched one could convert CO and C3H8 more efficiently, with 90% conversion of CO and C3H8 at only 73 and 196 degrees C, respectively. Such superior catalytic performance made it possible to be used for automotive emission control during cold-start period.

引用

页码：26 / 30

页数：5

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