期刊
CATALYSIS COMMUNICATIONS
卷 8, 期 11, 页码 1838-1842出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.catcom.2007.02.021
关键词
chlorine-free; Ru; ammonia synthesis; hydrazine reduction; supported catalysts
A series of Ru/Al2O3 catalysts for ammonia synthesis were prepared by hydrazine reduction of RuCl3 in KOH solution under the mild conditions, and characterized by XRF, TEM and CO chemisorption. The results showed that no chloride remained on the catalysts obtained by hydrazine reduction and the activities of the catalysts with hydrazine treatment were higher than those of conventional hydrogen-reduced catalysts. The particles sizes and the activities of the catalysts were determined by the molar ratios between hydrazine and ruthenium. The most promising catalyst was obtained when the hydrazine/ruthenium ratio was in the range of 1-3. (c) 2007 Elsevier B.V. All rights reserved.
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