Abstract:

Considering the significant influence of ammonia on food,chemical industry and energy,the effective activation of inert N₂ production of ammonia plays an important role in modern society.Introducing defects into the crystal structure to regu-late the chemical and physical properties of materials is an effective strategy to improve the electrocatalytic performance of ma-terials.The Ar⁺ plasma bombardment strategy was used to generate abundant oxygen defects on WO₃ nanowire arrays（V-WO₃）. The electrocatalytic activation of N≡N bond by V-WO₃ nanowire arrays was used to achieve efficient direct ammonia syn-thesis under environmental conditions.X-ray photoelectron spectroscopy（XPS） of oxygen element showed that V-WO₃ catalyst was rich in oxygen defects,which led to the efficient electrocatalytic conversion of N₂ to NH₃.

Key words: WO₃, oxygen defect, electrocatalytic synthesis of ammonia