TY - JOUR
T1 - Low-temperature catalytic oxidation of multi-walled carbon nanotubes
AU - Leino, Anne-Riikka
AU - Mohl, Melinda
AU - Kukkola, Jarmo
AU - Mäki-Arvela, Päivi
AU - Kokkonen, Tommi
AU - Shchukarev, Andrey
AU - Kordas, Krisztian
N1 - Funding Information:
The authors would like to thank Prof. Arthur E. Hill (Univ. Salford) and Dr. Robert Vajtai (Rice Univ.) for their valuable comments on the manuscript. We thank Jarkko Puustinen (Univ. Oulu) and Peter Pusztai (Univ. Szeged) for assisting with XRD and TGA measurements, respectively. A.-R. Leino is grateful for the post-graduate position and for the personal grants received from Graduate School in Electronics, Telecommunications and Automation, Emil Aaltonen and Tauno Tönning foundations. The work was supported by projects Urakamu2 (Tekes), Rocaname (Academy of Finland), Thema-CNT (EU FP7) and Napep (EU FP7).
Copyright:
Copyright 2013 Elsevier B.V., All rights reserved.
PY - 2013/6
Y1 - 2013/6
N2 - When in a pure form, carbon nanotubes are known to be stable in air up to ∼800 K making them attractive for a large variety of applications. In this work, we report a significant decrease of ignition temperature (in some cases occurring at ∼500 K) and a reduction in the apparent activation energy for oxidation in air as a result of impregnation with nanoparticles (<2 nm) of metal (Pt, Pd, Ni and Co) acetylacetonates or by decoration with corresponding oxides. Surprisingly, defects introduced by partial oxidation of the carbon nanotubes do not in practice have any influence on the enhancement of further oxidation. Reduction temperatures of metal oxides with H2 were close to those of other carbon supported catalyst materials. However, the carbon nanotubes showed a tendency for low temperature gasification in the presence of hydrogenation catalyst metals (Pt, Pd).
AB - When in a pure form, carbon nanotubes are known to be stable in air up to ∼800 K making them attractive for a large variety of applications. In this work, we report a significant decrease of ignition temperature (in some cases occurring at ∼500 K) and a reduction in the apparent activation energy for oxidation in air as a result of impregnation with nanoparticles (<2 nm) of metal (Pt, Pd, Ni and Co) acetylacetonates or by decoration with corresponding oxides. Surprisingly, defects introduced by partial oxidation of the carbon nanotubes do not in practice have any influence on the enhancement of further oxidation. Reduction temperatures of metal oxides with H2 were close to those of other carbon supported catalyst materials. However, the carbon nanotubes showed a tendency for low temperature gasification in the presence of hydrogenation catalyst metals (Pt, Pd).
UR - http://www.scopus.com/inward/record.url?scp=84875238360&partnerID=8YFLogxK
U2 - 10.1016/j.carbon.2013.01.040
DO - 10.1016/j.carbon.2013.01.040
M3 - Article
AN - SCOPUS:84875238360
SN - 0008-6223
VL - 57
SP - 99
EP - 107
JO - Carbon
JF - Carbon
ER -