http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
The thermal decomposition of ammonia borane: A potential hydrogen storage material
Mark Bowden,Tom Autrey,Ian Brown,Martin Ryan 한국물리학회 2008 Current Applied Physics Vol.8 No.3,4
One equivalent of hydrogen gas is evolved from ammonia borane (NH3BH3) when it is heated above 70.C. The initial stages of thisprocess have been examined using TG/DSC, optical microscopy, and high temperature X-ray diraction. Two exothermic events havefringence. The products are believed to be a more mobile form of NH3BH3 and the diammoniate of diborane ([NH3BH2NH 3]+[BH4]. ).These products subsequently react in the second exothermic stage to generate hydrogen.
Allendorf, Mark D.,Hulvey, Zeric,Gennett, Thomas,Ahmed, Alauddin,Autrey, Tom,Camp, Jeffrey,Seon Cho, Eun,Furukawa, Hiroyasu,Haranczyk, Maciej,Head-Gordon, Martin,Jeong, Sohee,Karkamkar, Abhi,Liu, Di-J The Royal Society of Chemistry 2018 ENERGY AND ENVIRONMENTAL SCIENCE Vol.11 No.10
<P>Nanoporous adsorbents are a diverse category of solid-state materials that hold considerable promise for vehicular hydrogen storage. Although impressive storage capacities have been demonstrated for several materials, particularly at cryogenic temperatures, materials meeting all of the targets established by the U.S. Department of Energy have yet to be identified. In this Perspective, we provide an overview of the major known and proposed strategies for hydrogen adsorbents, with the aim of guiding ongoing research as well as future new storage concepts. The discussion of each strategy includes current relevant literature, strengths and weaknesses, and outstanding challenges that preclude implementation. We consider in particular metal-organic frameworks (MOFs), including surface area/volume tailoring, open metal sites, and the binding of multiple H2 molecules to a single metal site. Two related classes of porous framework materials, covalent organic frameworks (COFs) and porous aromatic frameworks (PAFs), are also discussed, as are graphene and graphene oxide and doped porous carbons. We additionally introduce criteria for evaluating the merits of a particular materials design strategy. Computation has become an important tool in the discovery of new storage materials, and a brief introduction to the benefits and limitations of computational predictions of H2 physisorption is therefore presented. Finally, considerations for the synthesis and characterization of hydrogen storage adsorbents are discussed.</P>