Low-temperature catalytic oxidation of multi-walled carbon nanotubes

Anne Riikka Leino, Melinda Mohl, Jarmo Kukkola, Päivi Mäki-Arvela, Tommi Kokkonen, Andrey Shchukarev, Krisztian Kordas*

*Corresponding author for this work

Research output: Contribution to journalArticleScientificpeer-review

17 Citations (Scopus)

Abstract

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).

Original languageEnglish
Pages (from-to)99-107
Number of pages9
JournalCarbon
Volume57
DOIs
Publication statusPublished - Jun 2013
MoE publication typeA1 Journal article-refereed

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