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Surface structure of γ‐Alumina‐Supported Ruthenium Catalysts for ammonia synthesis
Author(s) -
de la Piscina P. Ramírez,
Homs N.,
Sueiras J. E.,
Fierro J. L. G.
Publication year - 1986
Publication title -
zeitschrift für anorganische und allgemeine chemie
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.354
H-Index - 66
eISSN - 1521-3749
pISSN - 0044-2313
DOI - 10.1002/zaac.19865320131
Subject(s) - ruthenium , catalysis , chemisorption , ammonia , inorganic chemistry , chemistry , dispersion (optics) , aqueous solution , hydrogen , metal , solvent , nuclear chemistry , organic chemistry , physics , optics
Ruthenium supported catalysts were prepared by impregnation of RuCl 3 · 3 H 2 O and K 4 [Ru(CN) 6 ] · 3 H 2 O aqueous acetone solutions upon several acid(base)‐modified γ‐Al 2 O 3 samples. Characterization of the catalysts was carried out by CO chemisorption and kinetics of hydrogen reduction, correlating the particle size and dispersion of the metallic phase with the previous acid modification of the γ‐Al 2 O 3 , as well as with the type of precursor and solvent used. The surface properties were also correlated with their catalytic activities for ammonia synthesis at atmospheric pressure and 583 K (N 2 /H 2 1/3).