Effects of pre-treatment in air microwave plasma on the structure of CNTs and the activity of Ru/CNTs catalysts for ammonia decomposition

被引：33

作者：

Chen, Jiuling ^{[1
]}

Zhu, Zhong Hua ^{[1
]}

Ma, Qing ^{[1
]}

Li, Li ^{[1
]}

Rudolph, Victor ^{[1
]}

Lu, Gao Qing ^{[2
]}

机构：

[1] Univ Queensland, Sch Engn, Div Chem Engn, Brisbane, Qld 4072, Australia

[2] Univ Queensland, ARC Ctr Excellence Funt Nanomat, Brisbane, Qld 4072, Australia

来源：

CATALYSIS TODAY | 2009年 / 148卷 / 1-2期

基金：

澳大利亚研究理事会;

关键词：

Ammonia decomposition; Carbon nanotubes; Ru catalyst; Hydrogen production; COX-FREE HYDROGEN; CARBON NANOTUBES; RUTHENIUM CATALYST; FUEL-CELLS; STRUCTURE SENSITIVITY; SURFACE GROUPS; RU CATALYST; SUPPORT; GENERATION; PROMOTER;

D O I：

10.1016/j.cattod.2009.02.005

中图分类号：

O69 [应用化学];

学科分类号：

081704 ;

摘要：

Carbon nanotubes (CNTs) were treated in air microwave plasma at three different microwave powers 80, 100 and 150 W. The effects of the treatment on the Structure of CNTs and the dispersion of Ru particles supported on CNTs were evaluated using XRD, N-2 physisorption, FTIR, TPD, XPS, TEM and CO chemisorptions. The results show that the bulk structure and the texture of the CNTs were unchanged, but phenolic hydroxyls and carboxyls appeared on the surface. The total concentration of these groups increases with the microwave power to 100 W, then decreases. The phenolic hydroxyls and carboxyls on the CNTs interact with Ru ions during the preparation of Ru/CNTs resulting in highly dispersed Ru particles. The activity of Ru/CNTs for ammonia decomposition depends on the dispersion of Ru particles, but is negatively affected by any remaining oxygen-containing groups on the surface. (C) 2009 Elsevier B.V. All rights reserved.

引用

页码：97 / 102

页数：6

共 31 条

[1] SUPPORT AND PROMOTER EFFECT OF RUTHENIUM CATALYST .1. CHARACTERIZATION OF ALKALI-PROMOTED RUTHENIUM ALUMINA CATALYSTS FOR AMMONIA-SYNTHESIS [J].

AIKA, K ;

SHIMAZAKI, K ;

HATTORI, Y ;

OHYA, A ;

OHSHIMA, S ;

SHIROTA, K ;

OZAKI, A .

JOURNAL OF CATALYSIS, 1985, 92 (02) :296-304

[2] SUPPORT AND PROMOTER EFFECT OF RUTHENIUM CATALYST .2. RUTHENIUM ALKALINE-EARTH CATALYST FOR ACTIVATION OF DINITROGEN [J].

AIKA, K ;

OHYA, A ;

OZAKI, A ;

INOUE, Y ;

YASUMORI, I .

JOURNAL OF CATALYSIS, 1985, 92 (02) :305-311

[3]

ANDERSON JR, 1975, SURFACE METALLIC CAT

[4] The 3-D structure of polycrystalline diamond film by electron backscattering diffraction (EBSD) [J].

Chen, HW ;

Rudolph, V .

[5] CO-free fuel processing for fuel cell applications [J].

Choudhary, TV ;

Goodman, DW .

CATALYSIS TODAY, 2002, 77 (1-2) :65-78

[6] Production of COx-free hydrogen for fuel cells via step-wise hydrocarbon reforming and catalytic dehydrogenation of ammonia [J].

Choudhary, TV ;

Sivadinarayana, C ;

Goodman, DW .

CHEMICAL ENGINEERING JOURNAL, 2003, 93 (01) :69-80

[7] A DRIFTS STUDY OF THE FORMATION OF SURFACE GROUPS ON CARBON BY OXIDATION [J].

FANNING, PE ;

VANNICE, MA .

CARBON, 1993, 31 (05) :721-730

[8] Structure sensitivity of supported ruthenium catalysts for ammonia synthesis [J].

Jacobsen, CJH ;

Dahl, S ;

Hansen, PL ;

Törnqvist, E ;

Jensen, L ;

Topsoe, H ;

Prip, DV ;

Moenshaug, PB ;

Chorkendorff, I .

JOURNAL OF MOLECULAR CATALYSIS A-CHEMICAL, 2000, 163 (1-2) :19-26

[9]

JIN QH, 1999, WEIBO HUAXUE

[10] Direct observation of the bridged water stretching vibrations inside a protein [J].

Kandori, H ;

Shichida, Y .

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 2000, 122 (47) :11745-11746

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