Pd-Doped Perovskite: An Effective Catalyst for Removal of NOx from Lean-Burn Exhausts with High Sulfur Resistance

被引：65

作者：

Li, Xingang ^{[1
,2
,3
]}

Chen, Cheng ^{[1
,2
]}

Liu, Cheng ^{[1
,2
,3
]}

Xian, Hui ^{[1
,4
]}

Guo, Li ^{[1
,2
,3
]}

Lv, Jiaolong ^{[1
,2
,3
]}

Jiang, Zheng ^{[5
]}

Vernoux, Philippe ^{[6
]}

机构：

[1] Tianjin Univ, Sch Chem Engn & Technol, Tianjin 300072, Peoples R China

[2] Tianjin Key Lab Appl Catalysis Sci & Technol, Tianjin 300072, Peoples R China

[3] Coinnovat Ctr Chem & Chem Engn Tianjin, Tianjin 300072, Peoples R China

[4] Pei Yang Distillat Engn Ltd Co, Tianjin 300072, Peoples R China

[5] Chinese Acad Sci, Shanghai Inst Appl Phys, Shanghai Synchrotron Radiat Facil, Shanghai 201800, Peoples R China

[6] Univ Lyon 1, Inst Res Catalysis & Environm Lyon, F-69626 Villeurbanne, France

来源：

ACS CATALYSIS | 2013年 / 3卷 / 06期

基金：

中国国家自然科学基金;

关键词：

Pd-doped; perovskite; lean-burn; NOx reduction; sulfur resistance; BAFEO3-X PEROVSKITE; REDUCTION; STORAGE; DEACTIVATION; PALLADIUM; EMISSIONS; BEHAVIOR; LACOO3; 3-WAY; RH;

D O I：

10.1021/cs400136t

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：

Herein, we report the Pd-doped perovskite La0.7Sr0.3CoO3 as an effective lean NOx trap (LNT) catalyst. This smart perovskite displays excellent NOx reduction activities for lean-burn exhausts (NOx conversion >90%, N-2 selectivity >90%) over a wide operating temperature range (275-400 degrees C), as well as an extremely high sulfur tolerance. Our results evidenced Pd dissolving into or segregating out of perovskite in lean-burn and fuel-rich atmospheres. The segregated metallic Pd from perovskite in fuel-rich atmospheres is crucial for obtaining these promising achievements. These findings provide a new possibility for the application of the Pd-based LNT catalysts.

引用

页码：1071 / 1075

页数：5

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