globalchange  > 气候变化与战略
DOI: 10.1016/j.scib.2019.12.019
论文题名:
Core@shell structured Au@SnO2 nanoparticles with improved N2 adsorption/activation and electrical conductivity for efficient N2 fixation
作者: Wang P.; Ji Y.; Shao Q.; Li Y.; Huang X.
刊名: Science Bulletin
ISSN: 20959273
出版年: 2020
卷: 65, 期:5
起始页码: 350
结束页码: 358
语种: 英语
中文关键词: Amorphous ; Core@shell ; Electroreduction ; Nitrogen fixation ; Vacancy engineering
英文关键词: Adsorption ; Ammonia ; Amorphous materials ; Chemical activation ; Electric conductivity ; Electrocatalysts ; Electrolytic reduction ; Gold ; Nanoparticles ; Nitrogen fixation ; Oxygen vacancies ; Controlled experiment ; Core shell ; Efficient strategy ; Electrical conductivity ; Electro reduction ; Enhanced adsorptions ; Faradaic efficiencies ; Vacancy engineering ; Shells (structures)
英文摘要: The design of electrocatalysts with enhanced adsorption and activation of nitrogen (N2) is critical for boosting the electrochemical N2 reduction (ENR). Herein, we developed an efficient strategy to facilitate N2 adsorption and activation for N2 electroreduction into ammonia (NH3) by vacancy engineering of core@shell structured Au@SnO2 nanoparticles (NPs). We found that the ultrathin amorphous SnO2 shell with enriched oxygen vacancies was conducive to adsorb N2 as well as promoted the N2 activation, meanwhile the metallic Au core ensured the good electrical conductivity for accelerating electrons transport during the electrochemical N2 reduction reaction, synergistically boosting the N2 electroreduction catalysis. As confirmed by the 15N-labeling and controlled experiments, the core@shell Au@amorphous SnO2 NPs with abundant oxygen vacancies show the best performance for N2 electroreduction with the NH3 yield rate of 21.9 μg h−1 mg−1 cat and faradaic efficiency of 15.2% at −0.2 VRHE, which surpass the Au@crystalline SnO2 NPs, individual Au NPs and all reported Au-based catalysts for ENR. © 2019 Science China Press
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/170066
Appears in Collections:气候变化与战略

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作者单位: College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou, 215123, China; Institute of Functional Nano & Soft Materials (FUNSOM), Soochow University, Suzhou, 215123, China

Recommended Citation:
Wang P.,Ji Y.,Shao Q.,et al. Core@shell structured Au@SnO2 nanoparticles with improved N2 adsorption/activation and electrical conductivity for efficient N2 fixation[J]. Science Bulletin,2020-01-01,65(5)
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