Abstract
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 2–3nm 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.
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► Ru(acac)3 was used as a precursor for Ru/MgO-Mesoporous Alumina (MA) aided by H2O2. ► Small Ru nanoparticles were highly dispersed along the channels of MgO-MA. ► Ru/MgO-MA showed high catalytic activity and stability during ammonia decomposition.