Pt and PteAg nanoparticles supported on carbon nanotubes (CNT) for oxygen reduction reaction in alkaline medium

dc.creatorRuíz Camacho, Beatriz
dc.creatorMedina Ramírez, A
dc.creatorFuentes Ramírez, Rosalba
dc.creatorNavarro, R
dc.creatorMartínez Gómez, c
dc.creatorPérez Larios, Alejandro
dc.date2022-09-08T17:11:26Z
dc.date2022-09-08T17:11:26Z
dc.date2022-08
dc.date.accessioned2023-07-21T21:45:46Z
dc.date.available2023-07-21T21:45:46Z
dc.identifierB. Ruiz-Camacho, A. Medina-Ramírez, R. Fuentes-Ramírez, R. Navarro, C. Martínez Goméz, A. Pérez-Larios. (2022). Pt and Pt–Ag nanoparticles supported on carbon nanotubes (CNT) for oxygen reduction reaction in alkaline médium. International Journal of Hydrogen Energy, Volume 47, Issue 70, Pages 30147-30159. ISSN 0360-3199. https://doi.org/10.1016/j.ijhydene.2022.03.190.
dc.identifier0360-3199
dc.identifierhttps://doi.org/10.1016/j.ijhydene.2022.03.190.
dc.identifierhttp://repositorio.cualtos.udg.mx:8080/jspui/handle/123456789/1404
dc.identifier.urihttps://repositorioslatinoamericanos.uchile.cl/handle/2250/7752875
dc.descriptionArtículo
dc.descriptionIn this work, we investigated the effect of the carbon nanotubes (CNT) as alternative support of cathodes for oxygen reduction reaction (ORR) in alkaline medium. The Pt and Pt-Ag nanomaterials supported on CNT were synthesized by sonochemical method. The crystalline structure, morphology, particle size, dispersion, specific surface area, and composition were investigated by XRD, SEM-EDS, TEM, HR-TEM, N2 adsorption-desorption and XPS characterization. The electrochemical activity for ORR was evaluated by cyclic voltammetry (CV), linear sweep voltammetry (LSV), and electrochemical impedance spectroscopy (EIS) in alkaline medium. The electrochemical stability was researched by an accelerated degradation test (ADT). Pt/CNT showed the better electrocatalytic activity towards ORR compared with Pte-g/CNT and Pt/C. Pt/CNT exhibited higher specific activity (1.12 mA cm2 Pt) than Pt/C (0.25 mA cm2 Pt) which can be attributed to smaller particle size, Pt-CNT interaction, and Pt load (5 wt%). The Pt monometallic samples supported on CNT and Vulcan showed higher electrochemical stability after ADT than PteAg bimetallic. The ORR activity of all materials synthesized proceeded through a four-electron pathway. Furthermore, the EIS results showed that Pt/CNT exhibited the lower resistance to the transfer electron compared with conventional Pt/C and PteAg/CNT
dc.languageen
dc.publisherElsevier - Science Direct
dc.relationInternational Journal of Hydrogen Energy;Volume 47, Issue 70, Pages 30147-30159
dc.subjectORR
dc.subjectalkaline medium
dc.subjectPt-Ag
dc.subjectcarbon nanotubes
dc.subjectsonochemical
dc.titlePt and PteAg nanoparticles supported on carbon nanotubes (CNT) for oxygen reduction reaction in alkaline medium
dc.typeArticle


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