Core-shell structured iron nanoparticles for the generation of COx-free hydrogen via ammonia decomposition

被引：52

作者：

Li, Yanxing ^{[1
,2
]}

Liu, Shunqiang ^{[1
]}

Yao, Lianghong ^{[1
,2
]}

Ji, Weijie ^{[1
]}

Au, Chak-Tong ^{[2
]}

机构：

[1] Nanjing Univ, Key Lab Mesoscop Chem, Minist Educ, Sch Chem & Chem Engn, Nanjing 210093, Peoples R China

[2] Hong Kong Baptist Univ, Dept Chem, Ctr Surface Anal & Res, Kowloon Tong, Hong Kong, Peoples R China

来源：

CATALYSIS COMMUNICATIONS | 2010年 / 11卷 / 05期

关键词：

Core-shell structure; Iron nanoparticles; Silica; COx-free hydrogen; Ammonia decomposition; FUEL-CELL APPLICATIONS; CORE/SHELL NANOCRYSTALS; COLLOIDAL PARTICLES; PHOTONIC CRYSTALS; SILICA SPHERES; CARBON; CATALYSTS; FABRICATION; METHANE; SYNGAS;

D O I：

10.1016/j.catcom.2009.11.003

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 iron nanoparticles that are encapsulated by microporous and mesoporous silica shells were synthesized for the generation of COx-free hydrogen through the catalytic decomposition of ammonia. The encapsulated iron nanoparticles show excellent catalytic activity, giving 100% ammonia conversion in the 650-670 degrees C range. The core-shell structured catalysts are highly stable under the adopted reaction conditions owing to the stable silica shells that effectively prevent aggregation of iron nanoparticles. In contrast, the naked iron nanoparticles deactivated gradually at 670 degrees C and lost 18% ammonia conversion in a period of 63 h. (C) 2009 Elsevier B.V. All rights reserved.

引用

页码：368 / 372

页数：5

共 36 条

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