NO reduction under diesel exhaust conditions over Au/Al2O3 prepared by deposition-precipitation method

被引：26
|
作者：
Miguel, P. [1 ,2 ]
Granger, P. [1 ]
Jagtap, N. [3 ]
Umbarkar, S. [3 ]
Dongare, M. [3 ]
Dujardin, C. [1 ]
机构：
[1] Univ Lille 1, Univ Nord France, UCCS UMR8181, F-59655 Villeneuve Dascq, France
[2] RENAULT SAS, Direct Ingn MAT, F-91510 Lardy, France
[3] Natl Chem Lab, Catalysis & Inorgan Chem Div, Pune 411008, Maharashtra, India
来源：
JOURNAL OF MOLECULAR CATALYSIS A-CHEMICAL | 2010年 / 322卷 / 1-2期
关键词：
NO reduction; Gold; Deposition-precipitation; In situ IR; XPS; SELECTIVE CATALYTIC-REDUCTION; LEAN-BURN CONDITIONS; SUPPORTED GOLD CATALYSTS; IN-SITU FTIR; METAL-OXIDES; NITROGEN MONOXIDE; SULFUR TOLERANCE; CO OXIDATION; PROPENE; HYDROCARBONS;
D O I：
10.1016/j.molcata.2010.02.024
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：
Gold supported on alumina was prepared by urea deposition-precipitation method and compared to silver supported on alumina for the selective catalytic reduction of NO by hydrocarbons under lean conditions. The catalyst showed activity in the reduction of NO and 100% selectivity towards N-2 in the temperature range 300-350 degrees C. At higher temperature the NO conversion decreased due to competitive oxidative reactions of the reductants. XPS analysis confirmed the good stability of gold nanoparticles deposited on alumina. Infrared studies showed the formation of various adsorbed species (formates, carboxylates, ad-NOx and cyanide) on the catalyst surface. Addition of H-2 to the feed containing decane enhanced the formation of these species on the catalyst surface as well as the catalytic activity for the NO conversion to N-2. (C) 2010 Elsevier B.V. All rights reserved.
引用
收藏
页码：90 / 97
页数：8
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