Loading effect of carbon-supported platinum nanocubes on oxygen electroreduction

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Título: Loading effect of carbon-supported platinum nanocubes on oxygen electroreduction
Autor/es: Jukk, Kristel | Kongi, Nadezda | Tammeveski, Kaido | Arán-Ais, Rosa M. | Solla-Gullón, José | Feliu, Juan M.
Grupo/s de investigación o GITE: Electroquímica de Superficies | Electroquímica Aplicada y Electrocatálisis
Centro, Departamento o Servicio: Universidad de Alicante. Departamento de Química Física | Universidad de Alicante. Instituto Universitario de Electroquímica
Palabras clave: Pt nanocubes | Shape-control | Carbon support | Electrocatalysis | Oxygen reduction
Área/s de conocimiento: Química Física
Fecha de publicación: 10-oct-2017
Editor: Elsevier
Cita bibliográfica: Electrochimica Acta. 2017, 251: 155-166. doi:10.1016/j.electacta.2017.08.099
Resumen: In this work, Vulcan carbon-supported cube-shape Pt nanoparticles with various metal loadings were synthesised in the presence of oleylamine and oleic acid. Surface morphology of different Pt/C samples was examined by transmission electron microscopy (TEM) and their metal loading verified by thermogravimetric analysis (TGA). TEM micrographs showed Pt nanoparticles with a preferential cubic-shape and increased agglomeration of the particles with increasing Pt loading. Electrochemical characterisation of the Pt/C catalysts indicated that the resulting Pt nanoparticles present a preferential (100) surface structure. The electrocatalytic properties of the Pt/C catalysts of different metal loading were evaluated towards the oxygen reduction reaction (ORR) both in acidic and alkaline media employing the rotating disk electrode (RDE) configuration. Interestingly, similar specific and mass activities were found in both solutions revealing that the ORR activities were independent of the Pt loading and suggesting that all the Pt nanocubes contributed as isolated particles.
Patrocinador/es: This work was financially supported by institutional research funding (IUT20-16) of the Estonian Ministry of Education and Research. This research was also supported by the EU through the European Regional Development Fund (TK141 “Advanced materials and high-technology devices for energy recuperation systems”). KJ would like to thank Archimedes Foundation for the partial study scholarship. JMF thanks MINECO (Project CTQ2016-76221-P (AEI/FEDER, UE)) and Generalitat Valenciana (Project PROMETEOII/2014/013) for financial support. JSG acknowledges financial support from VITC (Vicerrectorado de Investigación y Transferencia de Conocimiento) of the University of Alicante.
URI: http://hdl.handle.net/10045/70112
ISSN: 0013-4686 (Print) | 1873-3859 (Online)
DOI: 10.1016/j.electacta.2017.08.099
Idioma: eng
Tipo: info:eu-repo/semantics/article
Derechos: © 2017 Elsevier Ltd.
Revisión científica: si
Versión del editor: http://dx.doi.org/10.1016/j.electacta.2017.08.099
Aparece en las colecciones:INV - EQSUP - Artículos de Revistas
INV - LEQA - Artículos de Revistas

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