Direct observation of carbon nanotube formation in Pd/H-ZSM-5 and MoO3/H-ZSM-5 based methane activation catalysts
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The nature of carbonaceous species deposited upon MoO3/H-ZSM-5 and Pd/H-ZSM-5 based catalysts during methane activation at 700 °C has been studied. TEM evidences the formation of open-ended multi-walled carbon nanotubes on MoO3/H-ZSM-5 based dehydroaromatisation catalysts. Pd/H-ZSM-5 is more active, exclusively towards methane cracking and post-reaction analysis reveals the distribution of different carbonaceous species is more homogeneous which TEM demonstrates to be in the form of closed-end multi-walled carbon nanotubes.
Keywordscarbon nanotubes methane dehydroaromatisation zeolite TEM TGA
JSJH and SB acknowledge the EPSRC and University of Glasgow for the provision of a DTA studentship to SB. The kind assistance of Mrs. Kim Wilson in performing CHN analyses is gratefully acknowledged.
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