Fig. 3. Investigation of catalyst properties governing carbamate bond cleaving activity.

a NH₃-TPD spectra of the MOCs. The temperatures for the first ammonia desorption maxima are shown in Supplementary Fig 4. b Volcano correlation between total acidity and carbamate bond cleaving activity of the MOCs. The y-axis represents the average conversion of the model compounds achieved by each catalyst. c Conversion of the model compounds using CeO₂ annealed under argon at different temperatures. * Unannealed CeO₂. Reaction conditions: model carbamate (250 mg), catalyst (25 mg), H₂ (10 bar), 200 °C, 2 hours (M1 and M3) and 3.5 hours (M2). Full data of the conversions is available in Supplementary Table 7.