Seminar - Nanostructured Materials for Energy Applications by Prof. Qiang XU
日期：2018 年 11 月 01 日 ( 星期四)
Time：11:00 am – 12:00 pm
1) Porous metal-organic frameworks (MOFs) for energy applications
We have developed new applications of porous MOFs, especially for energy conversion and storage.1,2 Novel porous metal-organic frameworks have been synthesized, which present stable catalytic activities for the oxidation of CO to CO2. Metal nanoparticles (NPs) have been immobilized to MOFs by the solid-grinding method, impregnation method and double-solvents approach in combination with the H2 reduction, liquid-phase concentration-controlled reduction and the CO-directed reduction at the solid-gas interface, which exhibit excellent catalytic performances for various reactions, including hydrogen generation from chemical hydrides. “Quasi-MOFs” have been prepared by controlled deligandation of MOFs, which have a transition-state structure between the porous MOFs and metal oxides. The metal cluster/quasi-MOF composites not only retain a porous structure but also achieve a strong interaction between the metal clusters (eg, Au) and the inorganic nodes (eg, Cr–O) of the quasi-MOF, leading to dramatically enhanced catalytic performance in the low-temperature oxidation of carbon monoxide (CO). Porous carbons have been synthesized by using MOFs as templates/precursors and the resultant carbons display high specific surface areas and excellent electrochemical properties as electrode materials for electric double-layered capacitor (EDLC) and as catalysts for oxygen reduction reaction (ORR).
2) Metal nanoparticle-catalyzed hydrogen generation
We have reported liquid-phase hydrogen generation systems, which are based on metal nanoparticle-catalyzed hydrolysis of ammonia borane (NH3BH3), complete decomposition of hydrous hydrazine (H2NNH2) and decomposition of formic acid.3,4 The metal nanoparticles catalysts immobilized by the double- solvents method (DSM) inside the pores of MOFs, by the non-noble metal sacrificial approach (NNMSA) to reduced graphene oxide and by the weakly-capping growth approach (WCGA) to carbon nanospheres will be discussed. The use of soluble porous organic cages as a stabilizer and homogenizer toward the homogenization of heterogeneous metal nanoparticle catalysts with enhanced catalytic performance will also be discussed.
1. For recent reviews, see: (a) S.-L. Li, Q. Xu, Energy Environ. Sci., 2013, 6, 1656. (b) Q. L. Zhu, Q. Xu, Chem. Soc. Rev., 2014, 43, 5468. (c) J.- K. Sun, Q. Xu, Energy Environ. Sci., 2014, 7, 2071. (d) W. Xia, A. Mahmood, R.-Q. Zou, Q. Xu, Energy Environ. Sci., 2015, 8, 1837. (e) Q. L. Zhu, Q. Xu, Chem, 2016, 1, 220. (f) H. Wang, Q.-L. Zhu, R. Zou, Q. Xu, Chem, 2017, 2, 52. (g) S. Dang, Q.-L. Zhu, Q. Xu, Nat. Rev. Mater., 2018, 3, 17075.
2. (a) P. Pachfule, D. Shinde, M. Majumder, Q. Xu, Nat. Chem. 2016, 8, 718. (b) Q.-L. Zhu, W. Xia, T. Akita, R. Zou, Q. Xu, Adv. Mater. 2016, 28, 6391. (c) L.-F. Chen, Q. Xu, Science, 2017, 358, 304. (d) Q.-L. Zhu, W. Xia, L.-R. Zheng, R. Zou, Z. Liu, Q. Xu, ACS Energy Lett. 2017, 2, 504. (e) N. Tsumori, L. Chen, Q. Wang, Q.-L. Zhu, M. Kitta, Q. Xu, Chem, 2018, 4, 845.
3. For recent reviews, see: (a) M. Yadav, Q. Xu, Energy Environ. Sci. 2012, 5, 9698. (b) Q.-L. Zhu, Q. Xu, Energy Environ. Sci., 2015, 8, 478. (c) Z. P. Li, Q. Xu, Acc. Chem. Res., 2017, 50, 1449.
4. (a) J.-K. Sun, W.-W. Zhan, T. Akita, Q. Xu, J. Am. Chem. Soc., 2015, 137, 7063. (b) X. Yang, J.-K. Sun, M. Kitta, Q. Xu, Nat. Catal., 2018, 1, 214.
Qiang Xu received his PhD in 1994 from Osaka University. He is the Director of AIST-Kyoto University Chemical Energy Materials Open Innovation Laboratory (ChEM-OIL), Professor at Yangzhou University, Adjunct Professor at Kobe University/Kyoto University, and Distinguished Honorary Professor at The Hong Kong Polytechnic University. He received the Thomson Reuters Research Front Award in 2012 and was recognized as a highly cited researcher (2014-2017) in both Chemistry and Engineering by Thomson Reuters/Clarivate Analytics. His research interests include the chemistry of nanostructured materials and their applications, especially for catalysis and energy. He has published more than 300 papers with citations > 23000 and an h-index > 80 (Web of Science). He is on a number of editorial/advisory boards of journals, including EnergyChem (Elsevier, Editor-in-Chief), Coordination Chemistry Reviews (Elsevier; Associate Editor), Chem (Cell Press), Chemistry-an Asian Journal (Wiley) and Advanced Sustainable Systems (Wiley). He is a member of the European Academy of Sciences (EurASc).