电催化剂
法拉第效率
空位缺陷
电化学
材料科学
氨生产
氮气
氨
电解质
氧化物
异质结
化学工程
阳离子聚合
电极
纳米技术
化学
光电子学
物理化学
冶金
结晶学
有机化学
高分子化学
工程类
作者
Yan Fang,Yurui Xue,Lan Hui,Hongwei Yu,Chao Zhang,Xiaoqing Huang,Yuliang Li
标识
DOI:10.1002/advs.202102721
摘要
An iron vacancy-rich ferroferric oxide/graphdiyne heterostructure (IVR-FO/GDY) is rationally designed and fabricated for high-efficiency electrocatalytic nitrogen fixation to ammonia (ENFA). Experimental and theoretical results show that the GDY-induced iron vacancies in IVR-FO/GDY promote the electrocatalysis, and activate the local O sites to transfer electrons towards GDY to boost ENFA, resulting in promising electrocatalytic performances with a highest ammonia yield (YNH3 ) of 134.02 µg h-1 mgcat.-1 and Faradaic efficiency (FE) of up to 60.88%, as well as the high long-term stability in neutral electrolytes. The cationic vacancy activation strategy proposed in this work has strong general and universal guiding significance to the design of new efficient electrocatalysts for various electrochemical energy conversion reactions. Such defect engineering may be used efficiently in electrocatalysis, leading to the development and progress of energy industry.
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