Rhodium dispersion during NO/CO conversions

被引：50

作者：

Dent, Andrew J.

Evans, John ^{[1
]}

Fiddy, Steven G.

Jyoti, Bhrat

Newton, Mark A.

Tromp, Moniek

机构：

[1] Univ Southampton, Sch Chem, Southampton SO17 1BJ, Hants, England

[2] Diamond Light Source, Chilton OX11 0DE, Didcot, England

[3] European Synchrotron Radiat Facil, F-38043 Grenoble, France

[4] CCLRC, Daresbury Lab, Warrington WA4 4AD, Cheshire, England

来源：

ANGEWANDTE CHEMIE-INTERNATIONAL EDITION | 2007年 / 46卷 / 28期

关键词：

heterogeneous catalysis; IR spectroscopy; rhodiurn; synchrotron radiation;

D O I：

10.1002/anie.200701419

中图分类号：

O6 [化学];

学科分类号：

0703 [化学];

摘要：

Change and change again: Under catalytic conditions for NO/CO conversion, simultaneous time-resolved extended X-ray absorption fine structure spectroscopy and IR studies show that the rhodium atoms in 5 wt% Rh/Al2O 3 rapidly migrate between CO-covered Rh particles and mononuclear Rh-NO sites depending on the changing gas composition. At lower temperatures (473 K), there is interconversion between mononuclear Rh(CO)2 and Rh(NO) centers. (Figure Presented). © 2007 Wiley-VCH Verlag GmbH & Co. KGaA.

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收藏

页码：5356 / 5358

页数：3

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