Fig. 3: Characterization and adsorption of MNi-Pyz.

a, b In-situ variable-temperature powder diffraction pattern of NiNi-Pyz and CoNi-Pyz in air atmosphere. c Adsorption isotherms for NH₃ at 298 K. d Five-cycle of NH₃ capacities at 298 K even after placing MNi-Pyz in air for a month.