Characterisation of the active copper species for the NOx removal on Cu/Mg/Al mixed oxides derived from hydrotalcites:: an in situ XPS/XAES study

被引：43

作者：

Márquez, F

Palomares, AE

Rey, F

Corma, A

机构：

[1] Univ Politecn Valencia, CSIC, Inst Tecnol Quim, E-46071 Valencia, Spain

[2] Univ Politecn Valencia, Dept Ingn Quim & Nucl, Valencia 46022, Spain

来源：

JOURNAL OF MATERIALS CHEMISTRY | 2001年 / 11卷 / 06期

关键词：

D O I：

10.1039/b009166a

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 situ X-ray photoelectron spectroscopy was used to characterise Cu/Mg/Al mixed oxides derived from hydrotalcites (catalyst used for the NOx removal reaction). The active sites are the copper centres: (i) Cu(0) for NO decomposition and (ii) Cu(0) and/or Cu(I) for NO reduction with a hydrocarbon. The ability of these materials to redisperse the copper active sites without destroying the structure of the material makes them different from other catalysts such as zeolites, and is essential for suitable catalytic behaviour at high temperatures.

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页码：1675 / 1680

页数：6

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