The oxidation process was also carried out in a laboratory batch reactor, equipped with an internal PTFE liner. Co3O4 at the conditions reported in Table was selected as a reference to study the effect of different parameters (temperature, catalyst loading, catalyst composition, and pressure) on the catalytic activity. The results of the reference test are reported in Figure (light blue) and S24. For each catalyst and for each set of operating conditions, three catalytic tests with different contact times (2, 4, and 6 hours) were performed. The effect of the reaction temperature on the catalytic activity was tested by carrying out the reaction with Co3O4 at 160 °C and 180 °C. The results of the catalytic tests are reported in Section S9.