The production of ammonia (NH₃) from atmospheric dinitrogen is one of the most important and challenging chemical transformations. In addition to NH₃ being invaluable for the production of fertilizers necessary to sustain global agriculture, NH₃ is also an appealing nitrogen-based fuel due to its high energy density and ease of storage and distribution. However, producing NH₃ from N₂ using industrial Haber-Bosch catalysts is a highly energy-intensive process. Developing efficient electrocatalysts for NH₃ production from N₂, and protons and electrons, could augment this energy intensive process and enable distributed facilities for on-demand NH₃ production. Moreover, catalysts for the reverse reaction, NH₃ oxidation, will be essential to utilize the energy stored in N-H bonds. This presentation will describe iron and chromium complexes with tetradentate phosphine ligands to catalyze N₂ reduction. M-NH₃ complexes supported by bidentate phosphine ligands containing non-coordinating pendant amines for the catalytic oxidation of NH₃ to N₂ will also be discussed. The synthesis and initial electrochemical studies of these systems will be described.