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The thermodynamic characteristics of aggregation of fine-dispersed palladium |
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| Authors: | O V Belousov R V Borisov S M Zharkov A S Samoilo |
| Institution: | 1.Institute of Chemistry and Chemical Technology, Siberian Division,Russian Academy of Sciences,Krasnoyarsk,Russia;2.Kirenskii Institute of Physics, Siberian Division,Russian Academy of Sciences,Akademgorodok, Krasnoyarsk,Russia;3.Siberian Federal University,Krasnoyarsk,Russia |
| Abstract: | The size-dependent effects of the heterogeneous reaction PdCl42− + 2e = Pd0 + 4Cl− were studied in hydrochloric acid solutions of H2PdCl4 at 40–70°C. Changes in the structural characteristics of palladium black were analyzed by transmission electron microscopy and X-ray diffraction. The temperature dependence of the redox potential of the PdCl42−/Pd0 pair was used to determine the thermodynamic characteristics of aggregation of fine-dispersed palladium. The heat effect of the reaction was in satisfactory agreement with direct differential scanning calorimetry measurements. |
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