On the thermal decomposition of K2PdCl4 in a hydrogen atmosphere |
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| Authors: | WGI Marchée GM van Rosmalen G Hakvoort |
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| Institution: | Laboratory of General Chemistry, University of Technology, Delft The Netherlands;Laboratory of Inorganic and General Chemistry, University of Technology, Delft The Netherlands |
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| Abstract: | The decomposition of single crystals and powders of K2PdCl4 in a hydrogen atmosphere was investigated by means of thermogravimetry (TG) at temperatures between 85 and 170°C, and by optical microscopy. The rate of decomposition is controlled by a combined process of nucleation and growth. The activation energy was calculated to be 15.2 ± 0.5 kcal mol?1 for single crystals and 13.5 ± 0.4 kcal mol?1 for powders. The results are compared with those obtained for K2PtCl4.An attempt was made to explain the differences in the orientation relationships, previously determined by X-ray diffraction, between K2PtCl4 and K2PdCl4, Rb2PdCl4 and K2PdBr4 and their decomposition products with a different kinetic behaviour. |
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