Graphitic nanofilaments as novel support of Ru-Ba catalysts for ammonia synthesis

被引：120

作者：

Liang, CH ^{[1
]}

Li, ZL

Qiu, JS

Li, C

机构：

[1] Chinese Acad Sci, Dalian Inst Chem Phys, State Key Lab Catalysis, Dalian 116023, Peoples R China

[2] Dalian Univ Technol, Dept Mat & Chem Engn, Dalian 116012, Peoples R China

来源：

JOURNAL OF CATALYSIS | 2002年 / 211卷 / 01期

关键词：

graphitic nanofilaments; barium; ammonia synthesis; ruthenium;

D O I：

10.1006/jcat.2002.3724

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：

A novel graphitic-nanofilament-(GNF-) supported Ru-Ba catalyst is prepared and used in ammonia synthesis reaction. The Ru-Ba/GNFs catalyst shows remarkably high activity and stability for ammonia synthesis, which can be attributed to high purity and graphitization of GNFs with unique structure. TEM micrographs of the Ru-Ba/GNFs catalysts show that Ru metal particles uniformly disperse on the outer wall of GNFs, and the particles become bigger than that before ammonia synthesis reaction after 50 h of operation at 500degreesC and 7.0 MPa, probably due to the Ru crystals covered by promoter and support materials and/or sintering of Ru crystals. (C) 2002 Elsevier Science (USA).

引用

页码：278 / 282

页数：5

共 29 条

[1] ACTIVATION OF NITROGEN BY ALKALI-METAL PROMOTED TRANSITION-METAL .1. AMMONIA SYNTHESIS OVER RUTHENIUM PROMOTED BY ALKALI-METAL [J].

AIKA, K ;

OZAKI, A ;

HORI, H .

JOURNAL OF CATALYSIS, 1972, 27 (03) :424-&

[2] HETEROGENEOUS CATALYSIS OF AMMONIA-SYNTHESIS AT ROOM-TEMPERATURE AND ATMOSPHERIC-PRESSURE [J].

AIKA, K .

ANGEWANDTE CHEMIE-INTERNATIONAL EDITION IN ENGLISH, 1986, 25 (06) :558-559

[3] Graphite nanofibers as an electrode for fuel cell applications [J].

Bessel, CA ;

Laubernds, K ;

Rodriguez, NM ;

Baker, RTK .

JOURNAL OF PHYSICAL CHEMISTRY B, 2001, 105 (06) :1115-1118

[4]

Bielawa H, 2001, ANGEW CHEM INT EDIT, V40, P1061, DOI 10.1002/1521-3773(20010316)40:6<1061::AID-ANIE10610>3.0.CO

[5]

2-B

[6] Novel multi-walled nanotubes-supported and alkali-promoted Ru catalysts for ammonia synthesis under atmospheric pressure [J].

Chen, HB ;

Lin, JD ;

Cai, Y ;

Wang, XY ;

Yi, J ;

Wang, J ;

Wei, G ;

Lin, YZ ;

Liao, DW .

APPLIED SURFACE SCIENCE, 2001, 180 (3-4) :328-335

[7] CHARACTERIZATION AND AMMONIA-SYNTHESIS ACTIVITY OF RUTHENIUM ZEOLITE CATALYSTS [J].

CISNEROS, MD ;

LUNSFORD, JH .

JOURNAL OF CATALYSIS, 1993, 141 (01) :191-205

[8] Role of steps in N2 activation on Ru(0001) [J].

Dahl, S ;

Logadottir, A ;

Egeberg, RC ;

Larsen, JH ;

Chorkendorff, I ;

Törnqvist, E ;

Norskov, JK .

PHYSICAL REVIEW LETTERS, 1999, 83 (09) :1814-1817

[9] Carbon nanofibers: Catalytic synthesis and applications [J].

De Jong, KP ;

Geus, JW .

CATALYSIS REVIEWS-SCIENCE AND ENGINEERING, 2000, 42 (04) :481-510

[10] Atomic-resolution in situ transmission electron microscopy of a promoter of a heterogeneous catalyst [J].

Hansen, TW ;

Wagner, JB ;

Hansen, PL ;

Dahl, S ;

Topsoe, H ;

Jacobsen, CJH .

SCIENCE, 2001, 294 (5546) :1508-1510

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