Thermal decomposition of rhodium, iridium, and ruthenium chlorides

The decomposition of rhodium, indium, and ruthenium chloride hydrates in air and in hydrogen have been studied by means of thermogravimetric analysis; additional studies have been made of their reduction when dispersed on low- and high-area substrates. Under the conditions used, reduction to metal i...

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Bibliographic Details
Published in:Journal of catalysis 1968-01, Vol.11 (4), p.370-377
Main Authors: Newkirk, A.E., McKee, D.W.
Format: Article
Language:English
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Summary:The decomposition of rhodium, indium, and ruthenium chloride hydrates in air and in hydrogen have been studied by means of thermogravimetric analysis; additional studies have been made of their reduction when dispersed on low- and high-area substrates. Under the conditions used, reduction to metal is complete at 105 °, 190 °, and ~ 350 ° for the Rh, Ir, and Ru salts, respectively. In air, dechlorination and oxidation are complete at 890 °, 680 °, and ~ 440 °, respectively. Boron carbide, a low-area substrate, appears to exert little influence on the reduction temperature of the rhodium salt, whereas with alumina, a high-area support, desorption of decomposition products may be the cause for the slower rate of weight loss observed with all three salts.
ISSN:0021-9517
1090-2694
DOI:10.1016/0021-9517(68)90061-4