2021 年 46 巻 1 号 p. 23-27
Nitride-based materials such as BaCeO3-xNyHz and LaN enable the activation of N2 at nitride-vacancy sites with the help of spill-over hydrogen from transition metal surface. Fe, Co, and Ni nanopartilces combined with these nitrides function as efficient catalysts for ammonia synthesis through the lattice anion vacancy-mediated Mars-van Krevelen mechanism, while ammonia synthesis occurs over conventional catalysts through a Langmuir-Hinshelwood mechanism. As a result, these nitride-based catalysts surpass the activity of conventional Ru-based catalysts.