Synthesis of Ru nanoparticles confined in magnesium oxide-modified mesoporous alumina and their enhanced catalytic performance during ammonia decomposition
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- 作者：Hua Tan ; Kun Li ; Salim Sioud ; Dongkyu Cha ; Maan H. Amad ; Mohamed Nejib Hedhili ; Zeyad A. Al-Talla
- 关键词：Ru ; Mesoporous alumina ; MgO ; Ammonia decomposition
- 刊名：Catalysis Communications
- 出版年：2012
- 出版时间：5 September, 2012
- 年：2012
- 卷：26
- 期：Complete
- 页码：248-252
- 全文大小：886 K
文摘
In this work, Ru nanoparticles confined in the channels of ordered mesoporous alumina (MA) and magnesium oxide-modified ordered MA are prepared for the first time via a two-solvent technique, combined with the amorphous citrate route. Structural characterizations reveal that uniform 2-3 nm Ru nanoparticles are highly dispersed in the blockage-free channels of mesoporous supports. The Ru nanoparticles confined in MA modified with 20 % molar ratio magnesium oxide exhibited a high catalytic activity and stability during ammonia decomposition due to the optimized particle size, basic support, lack of chlorine, and confined space provided by the channels of the mesoporous supports.