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Electron microscopic and chemisorption comparison studies on the metal dispersion of Pd, Rh, and Ir supported catalysts
Author(s) -
Paryjczak Tadeusz,
Szymura Jacek A.
Publication year - 1979
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.19794490111
Subject(s) - chemisorption , catalysis , dispersion (optics) , metal , stoichiometry , crystallite , hydrogen , materials science , inorganic chemistry , palladium , adsorption , chemistry , analytical chemistry (journal) , crystallography , metallurgy , organic chemistry , optics , physics
The dispersion of Pd, Rh, and Ir supported catalysts had been studied by means of oxygen‐hydrogen chemisorption and high resolution electron microscopy. The good agreement among the methods had been obtained for catalysts with well‐dispersed active phase (crystallites 1–6 nm). It confirmed the simple adsorption stoichiometry ratios O/Me S and H/Me S which are 1. For Pd catalysts containing metal particles larger than 6 nm it was shown that O/Pd S = 0.66 while the H/Pd S = 1 as for the catalysts with well‐dispersed metal.