The beneficial effect of CO2 in the low temperature synthesis of high quality carbon nanofibers and thin multiwalled carbon nanotubes from CH4 over Ni catalysts

被引：29

作者：

Corthals, Steven ^{[1
]}

Van Noyen, Jasper ^{[1
]}

Geboers, Jan ^{[1
]}

Vosch, Tom

Liang, Duoduo ^{[2
]}

Ke, Xiaoxing ^{[2
]}

Hofkens, Johan

Van Tendeloo, Gustaaf ^{[2
]}

Jacobs, Pierre ^{[1
]}

Sels, Bert ^{[1
]}

机构：

[1] Katholieke Univ Leuven, Ctr Surface Chem & Catalysis, B-3001 Heverlee, Belgium

[2] Univ Antwerp, Electron Microscopy Mat Sci EMAT, B-2020 Antwerp, Belgium

来源：

CARBON | 2012年 / 50卷 / 02期

关键词：

LARGE-SCALE SYNTHESIS; PREPARED IN-SITU; METHANE DECOMPOSITION; IRON-NICKEL; GROWTH; HYDROGEN; PEROVSKITE; BEHAVIOR; PURIFICATION; DEPOSITION;

D O I：

10.1016/j.carbon.2011.08.047

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 low temperature chemical vapor deposition method is described for converting CH4 into high-quality carbon nanofibers (CNFs) using a Ni catalyst supported on either spinel or peroyskite oxides in the presence of CO2. The addition of CO2 has a significant influence on CNF purity and stability, while the CNF diameter distribution is significantly narrowed. Ultimately, the addition of CO2 changes the CNF structure from fishbone fibers to thin multiwalled carbon nanotubes. A new "in situ" cooling principle taking into account dry reforming chemistry and thermodynamics is introduced to account for the structural effects of CO2. (C) 2011 Elsevier Ltd. All rights reserved.

引用

页码：372 / 384

页数：13

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