In situ infrared study of catalytic decomposition of NO on carbon-supported Rh and Pd catalysts

被引:48
作者
Almusaiteer, K [1 ]
Krishnamurthy, R [1 ]
Chuang, SSC [1 ]
机构
[1] Univ Akron, Dept Chem Engn, Akron, OH 44325 USA
关键词
infrared spectroscopy; NO decomposition; oxygen desorption; Rh; Pd; activated carbon; adsorption; adsorbed NO;
D O I
10.1016/S0920-5861(99)00242-4
中图分类号
O69 [应用化学];
学科分类号
081704 ;
摘要
The direct catalytic decomposition of NO on Rh/Al2O3, Rh/C, Pd/Al2O3, and Pd/C catalysts was investigated at 673 K by in situ infrared (IR) coupled with mass spectroscopy (MS). NO decomposition on these catalysts initially produced N-2 and adsorbed oxygen. Different catalysts exhibit different capabilities for manipulating adsorbed oxygen. Rh/Al2O3 shows little activity for oxygen desorption, resulting in loss of catalyst activity; Rh/C shows the ability for promoting the adsorbed oxygen-carbon reaction, removing oxygen in the form of CO2; Pd/Al2O3 shows some activity for O-2 desorption. Use of carbon as a support for Pd promotes O-2 desorption, resulting in improvement of NO decomposition activity. The in situ IR results provide evidence to support the behavior of adsorbed oxygen on carbon-supported Rh and Pd catalysts. (C)2000 Elsevier Science B.V. All rights reserved.
引用
收藏
页码:291 / 299
页数:9
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