http://www.cnr.it/ontology/cnr/individuo/prodotto/ID191847

Dual Path Mechanism in the Thermal Reduction of Graphene Oxide (Articolo in rivista)

Type

Label

Dual Path Mechanism in the Thermal Reduction of Graphene Oxide (Articolo in rivista) (literal)

Anno

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi

Alternative label

Rosanna Larciprete (1); Stefano Fabris (2,3); Tao Sun (2,3); Paolo Lacovig (4); Alessandro Baraldi (5,6); Silvano Lizzit (4) (2011)
Dual Path Mechanism in the Thermal Reduction of Graphene Oxide
in Journal of the American Chemical Society (Print); ACS, American chemical society, Washington, DC (Stati Uniti d'America)
(literal)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori

Rosanna Larciprete (1); Stefano Fabris (2,3); Tao Sun (2,3); Paolo Lacovig (4); Alessandro Baraldi (5,6); Silvano Lizzit (4) (literal)

Pagina inizio

Pagina fine

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#url

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroVolume

Rivista

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#pagineTotali

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroFascicolo

Note

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni

1) CNR-Institute for Complex Systems, via Fosso del Cavaliere 100, I-00133 Roma, Italy 2) CNR-IOM DEMOCRITOS, Theory@Elettra group, S.S. 14 km 163.5, I-34149 Trieste, Italy 3) SISSA ? Scuola Internazionale Superiore di Studi Avanzati, via Bonomea 265, I-34136 Trieste, Italy 4) Sincrotrone Trieste S.C.p.A., Strada Statale 14 Km 163.5, I-34149 Trieste, Italy 5) Physics Department and CENMAT, University of Trieste, Via Valerio 2, I-34127 Trieste, Italy 6) Laboratorio TASC CNR-IOM, S.S. 14 Km 163.5, I-34149 Trieste, Italy (literal)

Titolo

Abstract

Graphene is easily produced by thermally reducing graphene oxide. However, defect formation in the C network during deoxygenation compromises the charge carrier mobility in the reduced material. Understanding the mechanisms of the thermal reactions is essential for defining alternative routes able to limit the density of defects generated by carbon evolution. Here, we identify a dual path mechanismin the thermal reduction of graphene oxide driven by the oxygen coverage: at low surface density, the O atoms adsorbed as epoxy groups evolve as O2 leaving the C network unmodified. At higher coverage, the formation of other O-containing species opens competing reaction channels, which consume the Cbackbone.We combined spectroscopic tools and ab initio calculations to probe the species residing on the surface and those released in the gas phase during heating and to identify reaction pathways and rate-limiting steps. Our results illuminate the current puzzling scenario of the low temperature gasification of graphene oxide. (literal)

Editore