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Effect of rare-eart...
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Yao, Mingguang
(författare)
Effect of rare-earth component of the RE/Ni catalyst on the formation and nanostructure of single-walled carbon nanotubes
- Artikel/kapitelEngelska2006
Förlag, utgivningsår, omfång ...
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2006-07-19
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American Chemical Society (ACS),2006
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printrdacarrier
Nummerbeteckningar
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LIBRIS-ID:oai:DiVA.org:umu-12467
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https://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-12467URI
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https://doi.org/10.1021/jp060942bDOI
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Språk:engelska
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Sammanfattning på:engelska
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Ämneskategori:ref swepub-contenttype
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Ämneskategori:art swepub-publicationtype
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A systematic experimental study has been carried out on the efficiency of bimetallic catalysts based on Ni and the rare-earth elements Y, La, Ce, Nd, Gd, Tb, Dy, Ho, Er, and Lu ( group A) and Eu, Sm, Yb, and Tm ( group B) in the synthesis of single-walled carbon nanotubes (SWNTs). The two groups give quite different results when analyzed by a combination of SEM/TEM and Raman and UV-NIR spectroscopies. The elements in group A have an obvious catalytic effect and increase the yield of SWNTs dramatically, whereas those in group B are not efficient catalysts. The diameter distribution of the synthesized SWNTs was also affected by the rare-earth element used. For group A metals, there is a tendency that the fraction of small-diameter tubes decreases with decreasing ionic radius of the rare-earth element used. EDX and X-ray analyses indicate that group A metals deposit on the cathode deposits and form rare-earth carbides, whereas no group B metals are found in cathode deposits, except for a small amount of Tm present in the form of thulium carbide. Further analysis indicates that there is a very strong correlation between the ability to form rare-earth carbides and the catalytic efficiency for the formation of SWNTs.
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Biuppslag (personer, institutioner, konferenser, titlar ...)
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Liu, Bingbing
(författare)
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Zou, Yonggang
(författare)
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Wang, Lin
(författare)
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Cui, Tian
(författare)
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Zou, Guangtian
(författare)
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Li, Jixue
(författare)
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Sundqvist, BertilUmeå universitet,Institutionen för fysik(Swepub:umu)besu0001
(författare)
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Umeå universitetInstitutionen för fysik
(creator_code:org_t)
Sammanhörande titlar
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Ingår i:Journal of Physical Chemistry B: American Chemical Society (ACS)110:31, s. 15284-152901520-61061520-5207
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