An XPS evidence of the effect of the electronic state of Pd on CH4 oxidation on Pd/γ-Al2O3 catalysts

被引：18

作者：

Corro, G.

Vazquez-Cuchillo, O.

Banuelos, F.

Fierro, J. L. G.

Azomoza, M.

机构：

[1] Univ Autonoma Puebla, Inst Ciencias, Puebla 72000, Mexico

[2] CSIC, Inst Catalys Petrquim, Madrid 28049, Spain

[3] Univ Autonoma Metropolitana Iztapalapa, Mexico City, DF, Mexico

来源：

CATALYSIS COMMUNICATIONS | 2007年 / 8卷 / 12期

关键词：

methane oxidation; NGV's emissions; Pd-Sn catalysts; sulfur deactivation;

D O I：

10.1016/j.catcom.2007.03.020

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：

In this work, we investigated the catalytic activity of 2% Pd/gamma-Al2O3 and 2% Pd-1% Sn/gamma-Al2O3 for CH4 oxidation in lean conditions in the presence and in the absence Of SO2 in the reaction feed. The catalysts were studied by the Pd3d(5/2) electron binding energy values determined by XPS analysis. Sulfates formation and/or tin addition to Pd/Al2O3 resulted in an increase of the Pd3d(5/2) electron binding energy. Results showed a direct relation between Pd activity for CH4 oxidation and the degree of oxidation of I'd species. (c) 2007 Elsevier B.V. All rights reserved.

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页码：1977 / 1980

页数：4

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