The influence of ceria and other rare earth promoters on palladium-based methane combustion catalysts

被引：56

作者：

Colussi, Sara ^{[1
]}

Trovarelli, Alessandro ^{[1
]}

Cristiani, Cinzia ^{[2
]}

Lietti, Luca ^{[3
,4
]}

Groppi, Gianpiero ^{[3
,4
]}

机构：

[1] Univ Udine, Dipartimento Chim Fis & Ambiente, I-33100 Udine, Italy

[2] Politecn Milan, Dipartimento Chim Mat & Ingn Chim G Natta, I-20133 Milan, Italy

[3] Politecn Milan, Lab Catalysis & Catalyt Proc, Dipartimento Energia, I-20133 Milan, Italy

[4] Politecn Milan, Ctr Excellence, NEMAS, I-20133 Milan, Italy

来源：

CATALYSIS TODAY | 2012年 / 180卷 / 01期

关键词：

Ceria; Palladium; Catalytic combustion; Rare earths; SUPPORTED PALLADIUM; OXIDATION; PDO; OXIDES; TRANSFORMATION; DYNAMICS; CH4;

D O I：

10.1016/j.cattod.2011.03.021

中图分类号：

O69 [应用化学];

学科分类号：

081704 ;

摘要：

In this work we investigate the effect of ceria and other rare earths (La, Pr, Tb) on Pd-PdO transformation, which is strongly related to the catalytic activity of Pd-based catalysts for the combustion of methane at high temperature. Also the behavior of Pd on ZrO2 and on yttria-stabilized zirconia is considered for comparison. The catalysts are characterized by XRD and BET surface area measurements. Pd-PdO transformation is studied by means of temperature programmed oxidation measurements and thermo-gravimetric analysis. Temperature programmed combustion experiments have been carried out in order to compare catalytic activity of different catalysts. The results show that rare earth oxides promote the onset of Pd re-oxidation upon cooling, that for ceria doped sample is reflected in an improvement in the catalytic activity. (C) 2011 Elsevier B.V. All rights reserved.

引用

页码：124 / 130

页数：7

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