Fig. 6. NH3 evolution via isothermal transition-metal nitride reduction: (A) NH3 yield vs. time and (B) solid weight fractions from the reaction of Mn4N with H2 at 1 bar vs. temperature. Error bars are via error propagation within a 95% confidence interval. Solid lines are shrinking-core models for the data at 550 °C and 700 °C controlled by the chemical reaction or gas phase diffusion.
