Marked adsorption irreversibility of graphitic nanoribbons for CO 2 and H 2O

Michihiro Asai, Tomonori Ohba, Takashi Iwanaga, Hirofumi Kanoh, Morinobu Endo, Jessica Campos-Delgado, Mauricio Terrones, Kazuyuki Nakai, Katsumi Kaneko

Research output: Contribution to journalArticlepeer-review

57 Scopus citations


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 2O 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 2O 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 2O indicates a high potential in the fabrication of novel types of catalysts and highly selective gas sensors.

Original languageEnglish (US)
Pages (from-to)14880-14883
Number of pages4
JournalJournal of the American Chemical Society
Issue number38
StatePublished - Sep 28 2011

All Science Journal Classification (ASJC) codes

  • Catalysis
  • General Chemistry
  • Biochemistry
  • Colloid and Surface Chemistry


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