NO reduction by CO in the presence of water over gold supported catalysts on CeO₂-Al₂O₃ mixed support, prepared by mechanochemical activation

详细信息	查看全文 | 推荐本文 |

• 作者：L. Ilieva ; G. Pantaleo ; J.W. Sobczak ; I. Ivanov ; A.M. Venezia ; D. Andreeva
• 关键词：Gold ; Ceria-alumina ; Mechanochemical activation ; NO reduction by CO ; Effect of water
• 刊名：Applied Catalysis B ; Environmental
• 出版年：2007
• 期刊代码：4_09263373
• 类别：ce
• 出版时间：30 October 2007
• 卷：76
• 期：1-2
• 页码：107-114
• 文件大小：831 K

摘要

The reduction of NO by CO was studied on gold catalysts supported on ceria-alumina, prepared by mechanochemical activation. The samples were characterized by means of XRD, TPR, XPS and Raman spectroscopy. The influence of water in the feed on the catalytic activity was evaluated as well. It was established that the addition of hydrogen and water improves NO reduction activity by CO. The role of water was connected to the hydrogen production by WGS. The role of oxygen vacancies created in ceria structure in the presence of alumina was also discussed. The 100%selectivity to N₂ at about 200 °C was kept in all cases of catalytic measurements, making the studied gold catalysts promising for practical application.