主 办:材料科学与工程系
报告人:Qiang Xu,National Institute of Advanced Industrial Science and Technology (AIST), Japan)
时 间:10月26日(周三)下午14:30
地 点:方正大厦301会议室
主持人:邹如强
报告内容摘要:
This talk includes following two topics:
1) Porous metal-organic frameworks (MOFs) as platforms for energy applications
There has been a rapid development in metal-organic frameworks (MOFs), especially porous MOFs, due to their high potential for diverse applications in the past decade, especially for clean energy.1,2 Recently, we have successfully synthesized a number of new porous MOFs and found their new applications as catalysts, as supports for metal nanoparticles and as templates/precursors for nanoporous carbon synthesis, as well as for large molecule separation. 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. 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). Mesoporous MOFs have been successfully synthesized, which can be used for separating large molecules.
2) Metal nanoparticle-catalyzed hydrogen generation from liquid-phase chemical hydrogen storage materials
Hydrogen, H2, is a globally accepted clean fuel. The use of hydrogen fuel cells in vehicles or in portable electronic devices requires lightweight H2 storage or “on-board” hydrogen generation, for which the most important are safety, ease to control and fast kinetics of the hydrogen release along with a high hydrogen content.3 Here we report excellent liquid-phase hydrogen generation systems suitable for use as portable hydrogen sources, which are based on metal nanoparticle-catalyzed hydrolysis of ammonia borane (NH3BH3), complete decomposition of hydrous hydrazine (H2NNH2) and decomposition of formic acid. 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.
报告人简介:
Professor Dr. Qiang Xu received his PhD degree in Physical Chemistry in 1994 at Osaka University, Japan. After one year working as a postdoctoral fellow at Osaka University, he started his career as a Research Scientist in Osaka National Research Institute in 1995. Currently, he is a Chief Senior Researcher at National Institute of Advanced Industrial Science and Technology (AIST, Japan) and adjunct professor at Kobe University. He received the Thomson Reuters Research Front Award in 2012 and was recognized as among the highly cited researchers (2014 & 2015 & 2016) in both fields of Chemistry and Engineering by Thomson Reuters. His research interests include syntheses of nanostructured materials, in particular porous materials, and related functional applications, especially for clean energy. He has published more than 300 papers in refereed journals with citations > 15000 citations and h-index > 64.
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