Modeling of oxygen reduction reaction in porous carbon materials in alkaline medium. Effect of microporosity

Please use this identifier to cite or link to this item:
Full metadata record
Full metadata record
DC FieldValueLanguage
dc.contributorElectrocatálisis y Electroquímica de Polímeroses_ES
dc.contributorMateriales Carbonosos y Medio Ambientees_ES
dc.contributor.authorGabe, Atsushi-
dc.contributor.authorRuiz‐Rosas, Ramiro-
dc.contributor.authorGonzález-Gaitán, Carolina-
dc.contributor.authorMorallon, Emilia-
dc.contributor.authorCazorla-Amorós, Diego-
dc.contributor.otherUniversidad de Alicante. Departamento de Química Inorgánicaes_ES
dc.contributor.otherUniversidad de Alicante. Departamento de Química Físicaes_ES
dc.contributor.otherUniversidad de Alicante. Instituto Universitario de Materialeses_ES
dc.identifier.citationJournal of Power Sources. 2019, 412: 451-464. doi:10.1016/j.jpowsour.2018.11.075es_ES
dc.identifier.issn0378-7753 (Print)-
dc.identifier.issn1873-2755 (Online)-
dc.description.abstractThe role of porosity, and more specifically, microporosity, in the performance of carbon materials as Oxygen Reduction Reaction (ORR) catalysts in alkaline medium still has to be clarified. For this purpose, a highly microporous KOH-activated carbon and a microporous char have been prepared and their ORR performance in alkaline media were compared to that of two commercial carbon blacks with low and high surface areas, respectively. Interestingly, all carbon materials show a two-wave electrocatalytic process, where the limiting current and the number of electron transferred increase when going to more negative potentials. The limiting current and onset potential of the second wave is positively related to the amount of microporosity, and H2O2 electrochemical reduction tests have confirmed that the second wave could be related to the catalytic activity towards this reaction. In accordance to these findings, a model is developed that takes into account narrow and wide micropores in both charge transfer reactions and the mass transfer rate of O2 and H2O2. This model successfully reproduces the experimental electrochemical response during ORR of the analyzed porous carbon materials and suggests the important role of narrow micropores in H2O2 reduction.es_ES
dc.description.sponsorshipThis work was supported by MINECO (CTQ2015-66080-R MINECO/FEDER) and Heiwa Nakajima Foundation.es_ES
dc.rights© 2018 Elsevier B.V.es_ES
dc.subjectOxygen reduction reactiones_ES
dc.subjectHydrogen peroxide reductiones_ES
dc.subjectORR mathematical modelinges_ES
dc.subjectCharge transfer reactiones_ES
dc.subjectMass transfer ratees_ES
dc.subject.otherQuímica Inorgánicaes_ES
dc.subject.otherQuímica Físicaes_ES
dc.titleModeling of oxygen reduction reaction in porous carbon materials in alkaline medium. Effect of microporosityes_ES
Appears in Collections:INV - GEPE - Artículos de Revistas
INV - MCMA - Artículos de Revistas

Files in This Item:
Files in This Item:
File Description SizeFormat 
Thumbnail2019_Gabe_etal_JPowerSources_final.pdfVersión final (acceso restringido)2,49 MBAdobe PDFOpen    Request a copy
Thumbnail2019_Gabe_etal_JPowerSources_preprint.pdfPreprint (acceso abierto)2,06 MBAdobe PDFOpen Preview

Items in RUA are protected by copyright, with all rights reserved, unless otherwise indicated.