▎ 摘　　要

NOVELTY - An electrocatalyst comprises several catalytic metal nanoparticles monodispersed on a surface of a crumpled transition metal dichalcogenide support. USE - Electrocatalyst is used for hydrogenation of nitrogen for producing ammonia. ADVANTAGE - The electrocatalyst demonstrate different nitrogen reduction reaction activities, which show varying resistance to electrochemical sintering and deactivation. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for preparation of hierarchically crumpled sheets of a layered material, which involves providing exfoliated sheets of the layered material, sealing the exfoliated sheets in a pressure vessel along with a polar solvent, and heating the sealed pressure vessel in excess of the boiling temperature of the polar solvent to hydrothermally convert the exfoliated sheets to hierarchically crumpled sheets of the layered material.