3 Direct temperature measurements of the reaction solutions (≥2 wt.%) showed its increase from 25 (thermostat setpoint) to 35-45˚C in first 1-2 minutes of running the process followed by gradual decrease to the setpoint. At the higher process temperatures this effect was less pronounced due to better heat dissipation from the reactor to the environment (ambient temperature about 20˚C). . Fitted parameters (Eq. 4) of the integrated H2 generation curves (Figure Modelling of the integrated experimental data on hydrogen evolution rates (Eq. 3; see Figure )) using the modified Avraami-Erofeev equation (Eq. 4) allowed us to achieve quite good fits, with Pearson correlation coefficients, R 2 , between 0.99 and 0.995. Analysis of temperature dependencies of the fitted parameters ti, t0, and n (see Table ) allows to summarise our observations as follows: