New hydrogen storage materials and phase change materials

Studies of economic, highly efficient and safe hydrogen storage materials(HSMs) play an important role in the development of fuel cells in vehicles. The application of phase change materials (PCMs) for solar thermal-energy storage has received considerable attention in recent years due to their high storage density. The promising materials for HSMs including MHx:M=Mg,La,Ni,etc., alanate, borohydride and MOF and PCMs such as microencapsulated PCMs, etc. are presented.Studies of economic, highly efficient and safe hydrogen storage materials(HSMs) play an important role in the development of fuel cells in vehicles. The application of phase change materials (PCMs) for solar thermal-energy storage has received considerable attention in recent years due to their high storage density. The promising materials for HSMs including MHx:M=Mg,La,Ni,etc., alanate, borohydride and MOF and PCMs such as microencapsulated PCMs, etc. are presented

THERMAL STABILITY AND GLASS TRANSITION BEHAVIOR OF PANI/MWNT COMPOSITES

Polyaniline/multi-walled carbon nanotube (PANI/MWNT) composites were prepared by in situ polymerization. Transmission electron microscope (TEM), X-ray diffraction (XRD) and Fourier transform infrared (FTIR) were used to characterize the PANI/MWTNT composites. Thermal stability and glass transition temperature (T(g)) were measured by thermogravimetry (TG) and temperature modulated differential scanning calorimetry (TMDSC), respectively. The TG and derivative thermogravimetry (DTG) curves indicated that with augment of MWNTs content, the thermal stability of PANI/MWNT composites increased continuously. While, T, increased and then decreased with the MWNTs content increasing from 0 to 20 mass%

Thermodynamic study of high capacity hydrogen storage materials

The studies of economic, high-efficient and safe hydrogen sources play an important role in the development of fuel cell in vehicles calls. However, the state-of-the-art of hydrogen storage materials (HSMs) hardly meets the requirements designed by the U.S.Department of Energy (9wt% for gravimetric hydrogen and 81kg.m-3 for volumetric hydrogen) for on-board strage applications for 2015. In recent years, studies on HSMs were performed in our lab. THe promising materials for HSMs studied in our laboratory include MHx (M = Mg, La, NI, etc.), alanate, borohydride and MOF were performed. The molar heat capacity of the MOF-177 was measured by a modulated differential scanning calorimetry (MDSC) over the temperature range from 260 to 360 K for the first time. The hydrogen storage performances of amterials were improved by using catalysts with hdyrogen spill-over effect of other additives

The properties of the modified Al2O3 wear-resistant addition of UV coatings

The properties of the modified Al2O3 wear-resistant addition of UV coating

Direct electron transfer of cytochrome c and its biosensor based on gold nanoparticles/room temperature ionic liquid/carbon nanotubes composite film

A robust and effective composite film based on gold natioparticles (GNPs)/room temperature ionic liquid (RTIL)/multi-wall carbon nanotubes (MWNTs) modified glassy carbon (GC) electrode was prepared by a layer-by-layer self-assembly technique. Cytochrome c (Cyt c) was successfully immobilized on the RTIL-nanohybrid film modified GC electrode by electrostatic adsorption. Direct electro-chemistry and electrocatalysis of Cyt c were investigated. The results suggested that Cyt c could be tightly adsorbed on the modified electrode. A pair of well-defined quasi-reversible redox peaks of Cyt c was obtained in 0.10 M, pH 7.0 phosphate buffer solution (PBS). RTIL-nanohybrid film showed an obvious promotion for the direct electron transfer between Cyt c and the underlying electrode. The immobilized Cyt c exhibited an excellent electrocatalytic activity towards the reduction of H2O2. The catalysis currents increased linearly to the H2O2 concentration in a wide range of 5.0 x 10(-5) - 1.15 x 10(-3) M. Based on the multilayer film, the third-generation biosensor could be constructed for the determination of H2O2. (C) 2007 Elsevier B.V. All rights reserved

Fast Cyclic Voltammetry of Self-assembled Alkanethiol and Hybridized DNA on Gold Plates for Novel Field Effect Transistor Sensors

Fast Cyclic Voltammetry of Self-assembled Alkanethiol and Hybridized DNA on Gold Plates for Novel Field Effect Transistor Sensor

Porous Chromium(III)-Based Coordination Polymers for Selective CO2 Capture over CH4

Porous Chromium(III)-Based Coordination Polymers for Selective CO2 Capture over CH

铝汞合金体系常温水解制氢技术

利用机械混合法制备了铝汞合金体系。该类合金具有很强的化学活性，在常温下与水反应迅速生成氢气，氢气产量接近理论值。如Al-5％Hg合金水解产生1175mL／g氢气，氢气产率为99％。考察了添加剂（Zn、NaCl）及球磨时间对铝一汞合金化学活性的影响。结果表明：锌部分取代汞，使铝汞合金的活性降低，且随AI—Hg—Zn合金中锌含量的增加，合金水解产氢气量降低，由1059mL／g（Al-9％Hg-1％Zn）降到427mL／g（Al-5％Hg-5％Zn）；但盐的加入，迅速加快了合金水解速率，从238mU（min·g）（Al-10％Hg）增加到457mU（min·g）（Al-5％Hg-5％NaCl）。以Al-9％Hg-1％NaCI合金为研究对象，球磨时间由1h延长到2h，其Al-9％Hg-1％NaCI合金的水解速率有所提高，但进一步延长球磨时间，反而降低了铝合金的活性，表明球磨时间对铝汞合金的，陛能有一定的影响

金属-氮-氢体系储氢材料

氢能作为未来理想的清洁能源之一,已经成为全球研究的重要领域,而在氢能的应用中最关键的问题是氢气的存储。近年来,人们的研究集中在固态储氢材料上,许多新型储氢材料不断出现,其中由轻元素组成的金属-氮-氢体系拥有储氢容量高、可逆性好等优点,被认为是最有前景的储氢材料之一。目前金属-氮-氢体系已经发展出许多体系,而研究最多的是Li-N-H和Li-Mg-N-H两种体系。本文重点综述了两者作为可逆储氢材料的研究现状,主要从制备方法、储氢性能、反应机理、理论计算和存在的问题等方面进行了讨论,同时指出了金属-氮-氢储氢体系的发展趋势