“…These values highlight the energy demands and releases at each step, which are comparatively lower than the direct nitrogen reduction reaction. 60 This comparison underscores the efficiency of the ammonia route in nitrate reduction, making it a more favorable pathway for practical applications. Moreover, online mass spectrometry analysis of the system, as presented in Figure S20 , demonstrates that no other nitrogen species, such as N 2 O, NO, N 2 , or N 2 O 5 , were generated during the process, aside from the hydrogen evolution reaction.…”