Supported Ni catalysts prepared from hydrotalcite-like compounds for the production of hydrogen by ammonia decomposition

被引：62
|
作者：
Sato, Katsutoshi [1 ,2 ]
Abe, Naruhiko [2 ]
Kawagoe, Takafumi [2 ]
Miyahara, Shin-ichiro [2 ]
Honda, Kyoko [2 ]
Nagaoka, Katsutoshi [2 ]
机构：
[1] Kyoto Univ, ESICB, Kyoto 6158520, Japan
[2] Oita Univ, Fac Engn, Dept Appl Chem, 700 Dannoharu, Oita 8701154, Japan
来源：
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY | 2017年 / 42卷 / 10期
关键词：
Ammonia; Energy carrier; Hydrogen production; Hydrotalcite-like compound; Ni catalyst; COX-FREE HYDROGEN; ON-SITE GENERATION; PARTIAL OXIDATION; REDUCTION; METHANE; NANOPARTICLES; WATER;
D O I：
10.1016/j.ijhydene.2016.11.150
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：
Ni catalysts with high surface areas were prepared from Mg-Al hydrotalcite-like compounds containing Ni with different Mg-to-Al ratios for the production of hydrogen via ammonia decomposition. At atomic ratios of Mg-to-Al from 3:1 to 6:1, Ni reduction was greater than 90%, and the amounts of Ni-0 exposed were kept at more than 200 mu mol g(-1). With the increase in Mg-to-Al ratio, turnover frequency was increased due to an increase in the basicity of the support. Of the catalysts examined, Ni_MgAl(6:1) exhibited the highest NH3 conversion, which was attributed to its relatively high basicity and large amount of Ni exposed. (C) 2016 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.
引用
收藏
页码：6610 / 6617
页数：8
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