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Title: Reduction and reconstruction of Co 3O 4 nanocubes upon carbon deposition
Authors: Feng, J.
Zeng, H.C. 
Issue Date: 15-Sep-2005
Citation: Feng, J., Zeng, H.C. (2005-09-15). Reduction and reconstruction of Co 3O 4 nanocubes upon carbon deposition. Journal of Physical Chemistry B 109 (36) : 17113-17119. ScholarBank@NUS Repository.
Abstract: We describe a synthetic investigation on the formation of carbon nanofibers using a preshaped free-standing metal-oxide catalyst (single-crystal-cobalt oxide (Co 3O 4) nanocubes). In reacting with acetylene (C 2H 2) vapor, Co 3O 4 nanocubes are reduced and reconstructed into metallic cobalt. The resultant metal catalyst with a 2-fold symmetry leads to a bilateral base growth for carbon nanofibers. Our findings indicate that an understanding of catalyst-assisted chemical vapor deposition (CVD) mechanisms can be acquired, when the shape, size, and crystal orientation of pristine metal catalysts are made known to the CVD process. By tracing their evolutional changes in structure and composition, the shape-designed model catalysts may offer new opportunities for mechanistic investigations on the chemical reactivity of nanoparticles, general catalyst-assisted material synthesis, and metal intercalation chemistry. © 2005 American Chemical Society.
Source Title: Journal of Physical Chemistry B
ISSN: 15206106
DOI: 10.1021/jp052551n
Appears in Collections:Staff Publications

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