Synthesis and multi-technique characterization of nickel loaded MCM-41 as potential hydrogen-storage materials
Synthesis and multi-technique characterization of nickel loaded MCM-41 as potential hydrogen-storage materials
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DOI：
10.1016/j.micromeso.2014.03.005
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发表时间：
2014-06-01
影响因子：
5.2
通讯作者：
Eimer, G.
中科院分区：
文献类型：
--
作者：
Carraro, P.;Elias, V.;Eimer, G.
采用湿法浸渍法制备了不同金属负载量的Ni/MCM-41样品。采用X射线衍射仪、氮气吸附-脱附、透射电子显微镜、电感耦合等离子体原子发射光谱、电子探针分析、紫外-可见漫反射光谱、红外光谱、吡啶吸附红外光谱和77K高低压吸氢等技术对材料进行了表征。镍的负载量对样品的结构、化学性能、酸性能和储氢性能有显著影响。因此，较低的镍负载量有利于高分散的镍物种的存在，这是造成Lewis酸性的原因。这些物种将促进氢的有利位置，从而对储氢能力产生积极的影响。(C)2014 Elsevier Inc.保留所有权利。
Ni/MCM-41 samples have been successfully prepared by wet impregnation method with different degrees of metal loading. Various techniques including X-ray diffraction, N-2 adsorption-desorption, transmission electron microscopy, inductively coupled plasma atomic emission spectroscopy, electron microprobe analysis, UV-Vis diffuse reflectance spectra, infrared analysis, adsorption of pyridine coupled to infrared spectroscopy and hydrogen adsorption at 77 K at high and low pressure conditions were employed for the materials characterization. The Ni loading degree had a marked influence on the structural, chemical, acid and hydrogen storage properties of the samples. Thus, a low Ni loading favors the presence of highly dispersed Ni species responsible of the Lewis acidity. These species would promote hydrogen-favorable sites leading to a positive effect on the hydrogen storage capacity. (C) 2014 Elsevier Inc. All rights reserved.