“…Ammonia is not only a highly important ingredient of the global industrial economy and agricultural development but also a valuable candidate for hydrogen storage owing to its carbon-free and liquefiable feature. − The Haber–Bosch process serves as the classical industrial NH 3 synthesis technology usually performing the dissociative nitrogen reduction pathway under high energy input, which produces approximately 1% of the total CO 2 emission on the world. , In recent years, nitrogen photofixation achieves solar-to-chemical energy conversion under ambient conditions, indicating a feasible pathway for ammonia synthesis. − Suitable photocatalysts, the core of such nitrogen photofixation processes, directly harvest solar energy to generate an abundance of electrons, facilitating the NN triple-bond activation and dissociation. − In fact, the ammonia synthesis efficiency is still far from satisfactory mainly due to limited light absorption and poor charge carrier separation. , Therefore, the development of brand-new photocatalysts featuring a wide absorption range as well as highly efficient electron transport efficiency is crucial to realize efficient nitrogen fixation under ambient conditions.…”