Catalytic ammonia decomposition over Ru/carbon catalysts: The importance of the structure of carbon support

被引：184

作者：

Li, L.

Zhu, Z. H. ^{[1
]}

Yan, Z. F.

Lu, G. Q.

Rintoul, L.

机构：

[1] Univ Queensland, ARC Ctr Funct Nanomat, Brisbane, Qld 4072, Australia

[2] Queensland Univ Technol, Sch Phys & Chem Sci, Brisbane, Qld, Australia

来源：

APPLIED CATALYSIS A-GENERAL | 2007年 / 320卷 / 166-172期

关键词：

ammonia decomposition; catalysts; carbon support; graphitic structure; pore structure;

D O I：

10.1016/j.apcata.2007.01.029

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：

Catalytic ammonia decomposition has been of increasing interests as a means of supplying pure hydrogen for fuel cells. In this study, Ru catalysts supported on different carbons were used for catalytic ammonia decomposition. The influences of the porous and graphitic structures of carbon supports on the activities of the catalysts were examined. The catalytic activity over supported Ru catalysts is ranked as Ru/GC (graphitic carbon) > Ru/CNTs (carbon nanotube) > Ru/CB-S (carbon black) > Ru/CB-C > Ru/CMK-3 approximate to Ru/AC. The samples are characterized by XRD, N-2 adsorption, Raman spectra and H-2 chemisorption. Ru particles are highly dispersed on carbon supports. The optimum range of Ru particle sizes is around 3-4 nm. On the support side, the graphitic structure of the carbons is critical to the activity of the supported Ru catalyst, while the surface area of carbons is less important. (c) 2007 Elsevier B.V. All rights reserved.

引用

页码：166 / 172

页数：7

共 45 条

[1]

BJORKMAN E, 1991, ENERG FUEL, V5, P753

[2] Kinetics of NH3 decomposition over well dispersed Ru [J].