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Influence of protons on reduction degree and defect formation in electrochemically reduced graphene oxide

dc.contributor.authorQuezada Renteria, Javier Alan
dc.contributor.authorAnia, Conchi O.
dc.contributor.authorChazaro Ruíz, Luis Felipe
dc.contributor.authorRangel Méndez, José René
dc.date.accessioned2020-12-04T19:42:15Z
dc.date.available2020-12-04T19:42:15Z
dc.date.issued2019
dc.identifier.citationJavier A. Quezada-Renteria, Conchi O. Ania, Luis F. Chazaro-Ruiz, Jose R. Rangel-Mendez, Influence of protons on reduction degree and defect formation in electrochemically reduced graphene oxide, Carbon, Volume 149, 2019, Pages 722-732, https://doi.org/10.1016/j.carbon.2019.04.109.
dc.identifier.urihttp://hdl.handle.net/11627/5502
dc.description.abstract"The electrochemical reduction of GO was investigated in aqueous, at both acid and basic pH, and organic media, to identify the possible role of protons (H+) in the reduction mechanism of this material. The obtained rGO films were characterized by FTIR, electrochemical methods, Raman and XPS spectroscopy. Data showed that the reduction was more efficient in acid and basic media due to the presence of protons and the capacity of water that works as a proton donor, resulting in C/O ratios of 3.8 and 7.8, respectively. Mostly hydroxyl, epoxide and carbonyl moieties were removed. In a proton-free organic electrolyte, a C/O ratio of 1.8 was obtained for most of the samples; nevertheless, the graphitic carbon sp2 domains were restored to a large extent in the absence of H+. The characterization of the material showed that the presence of protons, during the electrochemical reduction, caused hydrogenation reactions, which targeted the graphitic domains in rGO and resulted in the loss of sp2 hybridization. The presence of such defects modified the electrochemical properties of the rGO films, where, despite of exhibiting higher C/O ratio, the films reduced in aqueous electrolytes displayed lower electron transfer (e.g. ferrocyanide redox-probe) than those reduced in organic electrolyte."
dc.publisherElsevier
dc.rightsAttribution-NonCommercial-NoDerivatives 4.0 Internacional
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/4.0/
dc.subjectGraphene oxide
dc.subjectElectrochemical reduction
dc.subjectReduced graphene oxide
dc.subjectDefects
dc.subject.classificationQUÍMICA
dc.titleInfluence of protons on reduction degree and defect formation in electrochemically reduced graphene oxide
dc.typearticle
dc.identifier.doihttps://doi.org/10.1016/j.carbon.2019.04.109
dc.rights.accessAcceso Abierto


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Attribution-NonCommercial-NoDerivatives 4.0 Internacional
Except where otherwise noted, this item's license is described as Attribution-NonCommercial-NoDerivatives 4.0 Internacional