材料科学
催化作用
氨生产
超声
化学工程
压电
吸附
氨
异质结
解吸
纳米技术
复合材料
光电子学
物理化学
有机化学
化学
工程类
作者
Fengping Peng,Jing‐Yuan Lin,Haozhen Li,Ziming Liu,Qihang Su,Zhe Wu,Yafeng Xiao,Hongbo Yu,Mingji Zhang,Chunzheng Wu,Wei Wang,Chunhua Lu
出处
期刊:Nano Energy
[Elsevier]
日期:2022-05-01
卷期号:95: 107020-107020
被引量:18
标识
DOI:10.1016/j.nanoen.2022.107020
摘要
Using mechanical waste energy to drive the ammonia production from N2 and water under ambient conditions is of great significance yet still very challenging. In this work, we designed ZnO microrods and ZnO-Ag heterostructures that exhibited high activity, selectivity, and stability in the production of ammonia under ultrasound sonication. Combining the piezoelectric force microscopy (PFM), temperature programed desorption of N2 (N2-TPD), electron spin resonance (ESR), electrochemical analysis with finite element numerical simulation, we found that the size and morphology of ZnO greatly impacted the shape deformation as well as the piezoelectric potential across the material, while the oxygen vacancies were essential for the adsorption and activation of N2. Loading Ag NPs onto ZnO could further enhance the N2 fixation activity by generating local strain at the Ag-ZnO interface, enhancing the chemical adsorption of N2, and facilitating the separation of piezo-generated electrons and holes. Our work demonstrates the design principles of highly active piezoelectric catalysts for N2 fixation.
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