Marked Adsorption Irreversibility of Graphitic Nanoribbons for CO<sub>2</sub> and H<sub>2</sub>O
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- Michihiro Asai
- Department of Chemistry, Graduate school of Science, Chiba University, 1-33 Yayoi-cho, Inage-ku, Chiba 263-8522, Japan
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- Tomonori Ohba
- Department of Chemistry, Graduate school of Science, Chiba University, 1-33 Yayoi-cho, Inage-ku, Chiba 263-8522, Japan
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- Takashi Iwanaga
- Department of Chemistry, Graduate school of Science, Chiba University, 1-33 Yayoi-cho, Inage-ku, Chiba 263-8522, Japan
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- Hirofumi Kanoh
- Department of Chemistry, Graduate school of Science, Chiba University, 1-33 Yayoi-cho, Inage-ku, Chiba 263-8522, Japan
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- Morinobu Endo
- Research Center for Exotic Nanocarbons (JST), Shinshu University, 4-17-1 Wakasato, Nagano 380-8553, Japan
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- Jessica Campos-Delgado
- Divisão de Metrologia de Materiais, Instituto Nacional de Metrologia, Normalização e Qualidade Industrial (INMETRO), Duque de Caxias, RJ 25250-020, Brazil
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- Mauricio Terrones
- Department of Physics, Department of Materials Science and Engineering, and Materials Research Institute, The Pennsylvania State University, University Park, Pennsylvania 16802-6300, United States
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- Kazuyuki Nakai
- BEL Japan, Inc., Haradanaka 1-9-1, Toyonaka-shi, Osaka 561-0807, Japan
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- Katsumi Kaneko
- Research Center for Exotic Nanocarbons (JST), Shinshu University, 4-17-1 Wakasato, Nagano 380-8553, Japan
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説明
Graphene and graphitic nanoribbons possess different types of carbon hybridizations exhibiting different chemical activity. In particular, the basal plane of the honeycomb lattice of nanoribbons consisting of sp(2)-hybridized carbon atoms is chemically inert. Interestingly, their bare edges could be more reactive as a result of the presence of extra unpaired electrons, and for multilayer graphene nanoribbons, the presence of terraces and ripples could introduce additional chemical activity. In this study, a remarkable irreversibility in adsorption of CO(2) and H(2)O on graphitic nanoribbons was observed at ambient temperature, which is distinctly different from the behavior of nanoporous carbon and carbon blacks. We also noted that N(2) molecules strongly interact with the basal planes at 77 K in comparison with edges. The irreversible adsorptions of both CO(2) and H(2)O are due to the large number of sp(3)-hybridized carbon atoms located at the edges. The observed irreversible adsorptivity of the edge surfaces of graphitic nanoribbons for CO(2) and H(2)O indicates a high potential in the fabrication of novel types of catalysts and highly selective gas sensors.
収録刊行物
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- Journal of the American Chemical Society
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Journal of the American Chemical Society 133 (38), 14880-14883, 2011-08-31
American Chemical Society (ACS)
