Graphdiyne‐Induced Iron Vacancy for Efficient Nitrogen Conversion

Advanced Science

Bolong Huang¹  Huidi Yu²  Yan Fang²  Yuliang Li²  Chao Zhang²  Yurui Xue²  Lan Hui² 

[1] Department of Applied Biology and Chemical Technology the Hong Kong Polytechnic University Hung Hom Kowloon Hong Kong SAR 999077 P. R. China;Institute of Chemistry Chinese Academy of Sciences Beijing 100190 P. R. China;

关键词: electrocatalytic nitrogen fixation to ammonia;    graphdiyne;    iron vacancy generation;    structure optimization;   

DOI  :  10.1002/advs.202102721

来源: DOAJ

【 摘 要 】

Abstract 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.

【 授权许可】

Unknown