报告题目:Nanostructured materials and their functional applications
发布时间:2012-11-21 08:30:10      供稿部门:DNL1901、科技处

报告时间:2012年11月22日(星期四) 下午2:00-3:00

报告地点:能源楼一号楼1楼会议室

报告人:Prof. Qiang Xu

National Institute of Advanced Industrial Science and Technology (AIST) and Kobe University, Ikeda, Osaka 563-8577, Japan

Email: q.xu@aist.go.jp

报告人简介:

      徐强教授于1994年获得日本大阪大学理学博士学位。现任日本产业技术综合研究所(大阪)主任研究员, Adjunct Professor of Kobe University。长期从事储氢材料(主要为化学储氢)、燃料电池、纳米材料、金属及金属簇配合物、金属有机框架材料等方面的研究,取得一系列重要的科研成果。分别在J. Am. Chem. Soc.,Angew. Chem. Int. Ed等学术期刊发表研究论文250多篇,并于2012年荣获了 Thomson Reuters Research Front Award。

报告摘要:

This presentation includes following two topics:

1) Porous metal-organic frameworks (MOFs) as platforms for functional 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. Recently, we have successfully synthesized a number of new porous MOFs and found their new applications as catalysts, as templates for nanoporous carbon synthesis, and as supports for metal nanoparticles as well as for large molecule separation. Novel porous metal-organic frameworks have been synthesized, which presents a stable catalytic activity for the oxidation of CO to CO2. Porous carbon has been synthesized by using MOF-5 or ZIF-8 as a template and the resultant carbon displayed a high specific surface area and hydrogen uptake as well as excellent electrochemical properties as an electrode material for electric double-layered capacitor (EDLC). Metal nanoparticles (NPs) have been deposited to MOFs, which exhibit excellent catalytic performances in various reactions. Mesoporous MOFs have been successfully synthesized, which can be used for separating large dye molecules. Crystalline MOF nanosheets have been fabricated via top-down delamination from bulk crystals of a layered MOF, which exhibit remarkable amine intercalation property and reversible amine exchangeability.


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. 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. NH3BH3 dissolves in water to form a stable solution, to which the addition of a catalytic amount of suitable metal catalysts leads to rigorous release of hydrogen gas with an H2 to NH3BH3 ratio up to 3.0. Metal and metal-alloy nanoparticles (NPs) effectively catalyze the decomposition of hydrous hydrazine to selectively produce hydrogen under ambient reaction conditions. Gold-palladium alloy nanoparticles immobilized to mesoporous MOFs and monometallic gold nanoparticles encapsulated in amine-functionalized silica nanopheres exhibit high performances for catalytic decomposition of formic acid to H2 and CO2, the latter showing strong metal-molecular support interaction (SMMSI), an unusual effect from the molecular functionalization of metal/support. In addition, we have developed a novel direct ammonia borane fuel cell (DABFC) by combining the anodic oxidation of ammonia borane (H- to H+) and the cathodic reduction of O2.

报告联系人:DNL1901组 鞠晓花(9583)

首页  |  组织机构  |  研究部门  |  公用平台  |  科研动态  |  学术交流  |  企业合作  |  人才队伍  |  关于DNL  |  管理入口
Copyright 2008-2013. Dalian National Laboratory For Clean Energy. All Rights Reserved.
洁净能源国家实验室 版权所有 辽ICP备11011481号 网站管理员:徐婷,电话:0411-84379821,邮箱:xuting@dicp.ac.cn