Origin of transient species present on the surface of a PdO/γ-Al2O3 catalyst during the methane combustion reaction

被引：15

作者：

Demoulin, O ^{[1
]}

Navez, M ^{[1
]}

Ruiz, P ^{[1
]}

机构：

[1] Univ Catholique Louvain, Unite Catalyse & Chim Mat Divises, B-1348 Louvain, Belgium

来源：

CATALYSIS TODAY | 2006年 / 112卷 / 1-4期

关键词：

palladium; catalytic combustion; methane oxidation; Operando spectroscopy; in situ DRIFS;

D O I：

10.1016/j.cattod.2005.11.033

中图分类号：

O69 [应用化学];

学科分类号：

081704 ;

摘要：

Operando DRIFTS was applied to the study of the evolution of surface species formed on a Pd (2 wt.%)/gamma-Al2O3 catalyst in various conditions. No differences were observed as a function of the initial oxidation state of palladium. Formates/carbonates species were identified at low temperature (< 400 degrees C) and disappeared when CO2 production started. These species come from the Pd-catalyzed interaction of CO with the alumina support, while CO2 induces hydrogenocarbonates formation at low temperature (< 300 degrees C). Their presence does not explain the inhibiting effect of CO2 observed in CCM on Pd/gamma-Al2O3 catalysts. (c) 2005 Elsevier B.V All rights reserved.

引用

页码：153 / 156

页数：4

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