以氯化钌和水合肼反应制备了新型的氧化钌氨前驱体Ru(NH3)5Cl3.透射电镜和CO化学吸附结果表明,由Ru(NH3)5Cl3前驱体制备的活性炭(AC)负载的RuN/AC催化剂中.钌纳米粒子分散度高,粒径分布均匀.与以氯化钌为前驱体制备的Ru/AC催化剂相比,RuN/AC催化剂具有更高的氨合成活性,在10 MPa和10 000 h-1条件下活性增幅超过10%.
Ruthenium ammonium chloride, Ru(NH3)5Cl3, was prepared by the chemical reaction of ruthenium chloride with hydrazine hydrate and used as a novel ruthenium precursor for the preparation of activated carbon (AC)-supported Ru catalysts for ammonia synthesis. The results from TEM and CO chemisorption show that the Ru nanoparticles on the RuN/AC catalyst prepared from the Ru(NH3)5Cl3 precursor have much higher dispersion and more uniform size distribution than that on the Ru/AC catalyst from the RuCl3 precursor. The activity of the RuN/AC catalyst for ammonia synthesis was increased by more than 10% compared with the Ru/AC catalyst under the reaction conditions of 10 MPa and 10 000 h-1.
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