a) Hydrogenation and cleavage of N2 to NH3 with a Zr complex. b) N2 reduction and hydrogenation to NH3 with Fe complexes. c) N2 cleavage and hydrogenation to NH3 with a U complex (this work).
Nearly half of the world population is fed by the industrial N2 fixation, i. e., the Harbor-Bosch process. Although exergonic in nature, NH3 synthesis from N2 and H2 catalyzed by the fused Fe has to ...