Ammonia is the simplest nitrogen-containing compound and an essential nitrogen source in biological and industrial synthesis. In biological synthetic pathways, ammonia is playing a crucial role as a biologically available nitrogen source to produce amino acids, nucleotides, and so on in the nitrogen cycle [1]. Ammonia has been industrially produced from hydrogen and nitrogen since 1908 with the invention of the Haber–Bosch process operating at temperatures of 400 to 500°C and pressures of 1000 atm in the presence of an iron catalyst. Therefore, ammonia is an easily available industrially important raw material to synthesize nitrogen-containing molecules.