All hydrotalcites synthesized in flow exhibited the characteristic thermal decomposition profiles of hydrotalcites, with three endothermic transitions: (I) at low temperature, <100 °C, representing the loss of physisorbed interlayer water, (II) at ~ 150-250 °C, corresponding to the loss of interlayer water and carbonates, and (III) the high temperature transition, at 350-550 °C, corresponding to dehydroxylation and decarbonation processes . Depending on composition and aging temperature the shapes and positions of these transitions vary significantly (Table ; Figures and; ESI Figure ).