Abstract
The reduction of silver(I) oxide to metallic silver by gaseous hydrogen was studied by means of thermogravimetric analysis, at constant heating rates in the range 2.5–30 °C min −1. Under these conditions the reduction process completed in the temperature range 60–190 °C. Both the expanded Friedman's isoconversional method and Kissinger's method were used to determine the activation energy, and very similar values, 59.6 kJ mol −1 and 59.7 kJ mol −1, respectively, were obtained. The expanded Friedman's isoconversional method, involving the first order reaction model, enabled the satisfactory fit of the experimental data.
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