“…According to the Sabatier principle, as mentioned before, the optimum N carrier is expected to have an intermediate nitrogen interaction. The nitridation and denitridation behavior of a series of nitrides are compared by experiments and electronic structure calculations. , Significant generation of ammonia occurred in the temperature range of 250–400 °C for nitrides based on iron, rhenium, cobalt, nickel, copper, and zinc by consuming 10%, 30%, 13%, 30%, 25%, and 15% of their total lattice nitrogen. The depleted lattice nitrogen in these nitrides, however, could hardly be recharged at ambient pressure.…”