Hydrogenation of formate species formed by CO chemisorption on a zirconia aerogel in the presence of platinum

被引：36

作者：

Kalies, H ^{[1
]}

Pinto, N ^{[1
]}

Pajonk, GM ^{[1
]}

Bianchi, D ^{[1
]}

机构：

[1] Univ Lyon 1, UMR 5634, Lab Applicat Chim Environm, F-69622 Villeurbanne, France

来源：

APPLIED CATALYSIS A-GENERAL | 2000年 / 202卷 / 02期

关键词：

chemisorption; carbon monoxide; spill over; hydrogenation; platinum; ZrO2;

D O I：

10.1016/S0926-860X(00)00526-3

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：

The adsorption of CO (10% CO/He) on pure ZrO2 aerogel and on a 0.5% Pt/ZrO2 solid is studied at 638 K using in situ FTIR. It is shown that the two solids lead to the formation of the same adsorbed species: formate and carbonate species, in comparable superficial concentration. On ZrO2, the formate species are not hydrogenated in presence of pure hydrogen at 544 K. On Pt/ZrO2, they are hydrogenated at 544 K into adsorbed methoxy groups by hydrogen spilled over species. The methoxy groups are hydrogenated into methane by a process which probably involves a reverse spillover. (C) 2000 Elsevier Science B.V. All rights reserved.

引用

页码：197 / 205

页数：9

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