| 报告题目 | Integration of Nanoscale Metal-organic Frameworks with Inorganic Nanostructures: Precison in synthesis and application in catalysis |
| 报告人 | ZHAO Yingbo, PhD Candidate |
| 报告人单位 | College of Chemistry, University of California at Berkeley |
| 报告时间 | 2016-06-02 |
| 报告地点 | 合肥微尺度物质科学国家实验室九楼会议室（9004） |
| 主办单位 | 合肥微尺度物质科学国家实验室 |
| 报告介绍 | 报告摘要：
Conformal and oriented metal-organic frameworks (MOF) thin film enclosing arbitrary nanostructures (substrates, nanowires, nanocrystals) are fabricated with precisely controlled thickness and pristine interface. This is achieved by atomic layer deposition of aluminum oxide on the substrates and addition of a tetra-topic porphyrin based linker, 4,4',4'',4'''-(porphyrin-5,10,15,20-tetrayl)- tetrabenzoic acid (H4TCPP), to react with alumina and make MOF [Al2(OH)2TCPP] enclosures. Alumina thickness is precisely controlled from 0.1 to 3 nm, thus allowing control of the MOF thickness from 10 to 50 nm. Electron microscopy and grazing angle X-ray diffraction confirm the order and orientation of the MOF by virtue of the porphyrin units being perpendicular to the substrate surface. These features of the MOF enclosure enable us to use surface-enhanced Raman spectroscopy to directly track the porphyrin metalation process of the MOF enclosing octahedral silver nanocrystals. When metalated with cobalt, the Al2(OH)2TCPP-Co thin film functions as catalyst for the selective and efficient reduction of carbon dioxide to carbon monoxide (CO) in aqueous electrolytes with a selectivity for CO beyond 76% and stability over 7 h with a per-site turnover number (TON) of 1400. This electrochemical catalytic activity is unique to the thin film form of the MOF (below 100 nm) and depends strong on the film thickness. This research presents a generalizable method to produce structurally well-defined nano-MOF composite material that has extraordinary functions.
报告人简介：
赵英博，2012年毕业于中国科学技术大学少年班学院，并进入加州大学伯克利分校化学院Omar Yaghi教授研究组攻读博士学位，主要从事纳米尺度金属有机框架结构的合成和应用研究。在Science、JACS等重要期刊发表多篇论文。代表性论文包括：
1、 Liu, Y*., Ma, Y.*, Zhao, Y.*, Sun, X., Gándara, F., Furukawa, H., Liu, Z., Zhu, H., Zhu, C., Suenaga, K., Oleynikov, P., Alshammari, A. S., Zhang, X., Terasaki, O. & Yaghi, O. M. Science 351, 365-369, (2016).
2、 Jiang, J.*, Zhao, Y.* & Yaghi, O. M. J. Am. Chem. Soc. 138, 3255-3265, (2016).
3、 Zhao, Y*., Kornienko, N.*, Liu, Z., Zhu, C., Asahina, S., Kuo, T.-R., Bao, W., Xie, C., Hexemer, A., Terasaki, O., Yang, P. & Yaghi, O. M. J. Am. Chem. Soc. 137, 2199-2202, (2015).
4、Kornienko, N.*, Zhao, Y.*, Kley, C. S., Zhu, C., Kim, D., Lin, S., Chang, C. J., Yaghi, O. M. & Yang, P. J. Am. Chem. Soc. 137, 14129-14135, (2015). |
