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报告题目 |
Boron and/or nitrogen-based materials for chemical hydrogen storage |
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报告时间 |
2014年10月29日(星期三)下午2:30-3:30 |
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报告地点 |
环境资源楼939室 |
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报告摘要 |
In chemical hydrogen storage, B and/or N-based materials have shown to be promising, especially owing to their high gravimetric hydrogen density. NaBH4 and NH3BH3 are typical examples with 10.8 and 19.5 wt% H. My group has been working on the synthesis of this kind of materials and on their hydro-/thermo-lytic dehydrogenation since 2007. A short overview of our main results will be provided as introduction of my presentation. In 2011, we have started an activity on a derivative of ammonia borane, i.e. hydrazine borane N2H4BH3 (15.4 wt% H). On the one hand, it has attracted our attention as, unlike ammonia borane, the N-containing moiety, i.e. N2H4, can be dehydrogenated in aqueous solution in the presence of an active and selective bi-metallic catalyst. On the other hand, like ammonia borane, hydrazine borane can be decomposed under heating (from 60°C). Nonetheless, the unwanted N2H4 forms as by-product and a shock-sensitive residue is “dangerously” recovered upon heating at >300°C. This made us thinking about its chemical modification with the synthesis by ball-milling of alkali and alkali-earth derivatives, i.e. the hydrazinidoboranes. Our recent results about the lithium (2 phases) and sodium hydrazinidoboranes will be presented. Since 2013, we have started to scrutinize the potential of hydrazine bisborane N2H4(BH3)2 for solid-/liquid-state hydrogen storage. Our recent data will be briefly presented so that the potential of this material is discussed after my talk. |
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报告人 |
Professor Umit B. Demirci， Associate Professor at Université Montpellier 2, France |
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报告人简介： Dr. Umit B. DEMIRCI received his PhD in Physical Chemistry in 2002 at the University of Strasbourg 1. From 2002 to 2007, he worked at different places and gained expertise in metal-based catalysis. In 2007, Dr. DEMIRCI became Associate Professor at the University of Lyon 1. In 2011, he had the opportunity to join the University of Montpellier 2. Since then, he works at the European Institute of Membranes. Since 2007, he has specialized in heterogeneous catalysis, and boron- and nitrogen-based materials for liquid- and solid-phase chemical hydrogen storage. Dr. DEMIRCI is member of the French Chemical Society (SCF), topic-leader in the national research group HySPaC supported by CNRS, member of the national council for universities CNU33, and associate editors of 2 international journals.
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主办单位：化学与材料科学学院 | |