Effects of nitrogen doping on the structure of carbon nanotubes (CNTs) and activity of Ru/CNTs in ammonia decomposition

被引：115

作者：

Chen, Jiuling ^{[1
]}

Zhu, Zhong Hua ^{[1
]}

Wang, Shaobin ^{[2
]}

Ma, Qing ^{[1
]}

Rudolph, Victor ^{[1
]}

Lu, Gao Qing ^{[3
]}

机构：

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

[2] Curtin Univ Technol, Dept Chem Engn, Perth, WA 6845, Australia

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

来源：

CHEMICAL ENGINEERING JOURNAL | 2010年 / 156卷 / 02期

关键词：

Microwave plasma; Nitrogen doping; CNT-supported Ru catalyst; Ammonia decomposition; Hydrogen production; FUEL-CELL APPLICATIONS; SUPPORTED RUTHENIUM CATALYSTS; CHEMICAL-VAPOR-DEPOSITION; COX-FREE HYDROGEN; STRUCTURE SENSITIVITY; RU CATALYSTS; XPS; TEMPERATURE; GENERATION;

D O I：

10.1016/j.cej.2009.10.062

中图分类号：

X [环境科学、安全科学];

学科分类号：

083001 [环境科学];

摘要：

Nitrogen doping on carbon nanotubes (CNTs) was carried out using N-2 microwave plasma at the powers of 200 and 400 W. N-2 physisorption, XPS, XRD, TEM, and CO chemisorption were employed to investigate the effects of nitrogen doping on the structure of CNTs and the state of Ru particles supported on CNTs. The bulk structure and the surface texture of CNTs remain unchanged by such nitrogen doping. Two types of nitrogen species, pyridinic and quaternary nitrogen, were found on the surface of nitrogen doped CNTs. Pyridinic nitrogen atom may have a strong interaction with Ru. The average Ru particle size decreases with the increase of pyridinic nitrogen content. The activity of Ru/CNTs catalysts in ammonia decomposition is dependent on the dispersion of Ru particles and remaining nitrogen on the surface of CNTs. (C) 2009 Elsevier B.V. All rights reserved.

引用

页码：404 / 410

页数：7

共 35 条

[1]

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

[2]

ANDERSON JR, 1975, SHEPARD KOLLOCK EDIT, P107

[3]

XPS spectra of thin CNx films prepared by chemical vapor deposition [J].

Beshkov, G ;

Dimitrov, DB ;

Georgiev, S ;

Juan-Cheng, D ;

Petrov, P ;

Velchev, N ;

Krastev, V .

[4]

Resolution of the binding configuration in nitrogen-doped carbon nanotubes [J].

Chan, LH ;

Hong, KH ;

Xiao, DQ ;

Lin, TC ;

Lai, SH ;

Hsieh, WJ ;

Shih, HC .

PHYSICAL REVIEW B, 2004, 70 (12) :125408-1

[5]

Ammonia decomposition kinetics over Ni-Pt/Al2O3 for PEM fuel cell applications [J].

Chellappa, AS ;

Fischer, CM ;

Thomson, WJ .

APPLIED CATALYSIS A-GENERAL, 2002, 227 (1-2) :231-240

[6]

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

Chen, HW ;

Rudolph, V .

[7]

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

Choudhary, TV ;

Goodman, DW .

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

[8]

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

[9]

A pyridine-containing ruthenium-indenylidene complex: Synthesis and activity in ring-closing metathesis [J].

Clavier, Herve ;

Petersen, Jeffrey L. ;

Nolan, Steven P. .

JOURNAL OF ORGANOMETALLIC CHEMISTRY, 2006, 691 (24-25) :5444-5447

[10]

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

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