. In most scenarios, the presence of NaOH, acting as a catalyst promotor, is essential, however. This is because NaOH promotes the ratedetermining deprotonation step (N2H4 - N2H3* + H*), while it suppresses the formation of N2H5 + (N2H5 + + OH - N2H4 + H2O). Thus, it is of benefit for the elimination of N–H bonds to produce N2 and H2.