Temperature dependence of hydrogen adsorption properties of nickel-doped mesoporous silica

被引：12
|
作者：
Yamamoto, Yoshifumi [1 ]
Nawa, Nozomi [1 ]
Nishimoto, Shunsuke [1 ]
Kameshima, Yoshikazu [1 ]
Matsuda, Motohide [1 ]
Miyake, Michihiro [1 ]
机构：
[1] Okayama Univ, Dept Mat & Energy Sci, Grad Sch Environm Sci, Kita Ku, Okayama 7008530, Japan
来源：
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY | 2011年 / 36卷 / 09期
关键词：
Hydrogen adsorption; Nickel; MCM-41; Temperature dependence; Spillover effect; METAL-ORGANIC FRAMEWORKS; STORAGE; CARBON; CATALYSTS; NANOPARTICLES; DESORPTION; SPILLOVER; PRESSURE; PLATINUM;
D O I：
10.1016/j.ijhydene.2011.02.010
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
The temperature dependence of the hydrogen adsorption properties of nickel-doped mesoporous silica (MCM-41) synthesized by a direct hydrothermal method was investigated by measuring the amount of hydrogen adsorbed at pressures up to 100 kPa at 298, 373, and 473 K. Nickel-doped MCM-41 adsorbed more hydrogen than undoped MCM-41 and metallic nickel at approximate to 298/0, 373/0, and 473 K/0 kPa due to chemical adsorption enhanced by the highly dispersed nickel particles. Chemical adsorption increased with increasing nickel content and adsorption temperature, suggesting the presence of adsorption sites. The nickel doping also brought the spillover effect, which enhances the physical adsorption of hydrogen. The spillover effect was enhanced at high nickel contents and adsorption temperatures. Copyright (C) 2011, Hydrogen Energy Publications, LLC. Published by Elsevier Ltd. All rights reserved.
引用
收藏
页码：5739 / 5743
页数：5
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