报告题目：Design of Nanostructured Catalytic Materials for Control of Chemical Reactions
报告人：KYUNGSU NA (Chonnam National University, South Korea)
Enhancement of catalytic activity and control of the reaction pathway to produce a high yield of desired product with 100% selectivity are of paramount interest for the development of energy-saving and eco-friendly catalytic reactions. In order to simultaneously achieve high catalytic activity with 100% product selectivity, catalytic systems should be tailored delicately. Synthetic development of metal nanoparticles (NPs) with various sizes and shapes can be one of the great contributions towards realization of this goal. Along with this, the development of various porous inorganic supports like microporous (0<diameter<2 nm) zeolites and mesoporous (2<diameter<50 nm) silica materials has allowed the metal NPs to be used as a practically useful catalyst in industrial processes. Such catalytic systems (i.e., metal NPs supported on porous support) have enabled catalytic investigation of the metal NPs according to the variations of size and shape. In addition, hierarchically nanoporous zeolites having mesopores as well as intrinsic micropores have attracted much attention as heterogeneous catalysts and catalyst supports. In this presentation, hierarchically nanoporous zeolites supporting Pt metal NPs have been investigated for enhancement of catalytic activity and control of product selectivity during the hydrogenative reforming of methylcyclopentane (MCP) as a model hydrocarbon reactant. The Pt NPs supported hierarchically nanoporous zeolites can be used as bifunctional catalysts for dominant production of enlarged cyclic hydrocarbons such as cyclohexane and benzene. According to the control of acidity, the product selectivity between cyclohexane and benzene was systematically changed. In addition, it was also revealed that the cyclohexene can be a short-lived intermediate species within the timescale of reaction turnovers, by using sum frequency generation vibrational spectroscopy under the reaction condition. As the potential heterogeneous catalyst, possibility of metal-organic frameworks (MOFs) in gas-phase reactions are also discussed to control the product selectivity.
Kyungsu Na教授于2011年在韩国高等科学技术院（Korea Advanced Institute of Science and Technology，简称KAIST）获得博士学位，导师为世界知名材料学家Ryong Ryoo教授，2012年至2015年在美国加州大学伯克利分校从事博士后的研究工作，合作导师为“现代表面催化化学之父”Gabor A. Somorjai教授。他于2015年3月正式加入韩国全南国立大学，任助理教授。
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