The research groups led by Prof. Chen Ping and Prof. Jiang Ling(DICP112) collaboratively process an important progress on mechanism understanding of catalytic ammonia synthesis. The results of this research have been published in Angew. Chem. Int. Ed. entitled as "The formation of surface lithium–iron rernary hydride and its function on catalytic ammonia synthesis at low temperatures." (DOI: 10.1002/anie.201703695).