Key factors improving oxygen reduction reaction activity in cobalt nanoparticles modified carbon nanotubes

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dc.contributorMateriales Carbonosos y Medio Ambientees_ES
dc.contributorElectrocatálisis y Electroquímica de Polímeroses_ES
dc.contributor.authorGabe, Atsushi-
dc.contributor.authorGarcía Aguilar, Jaime-
dc.contributor.authorBerenguer-Murcia, Ángel-
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.citationApplied Catalysis B: Environmental. 2017, 217: 303-312. doi:10.1016/j.apcatb.2017.05.096es_ES
dc.identifier.issn0926-3373 (Print)-
dc.identifier.issn1873-3883 (Online)-
dc.description.abstractMultiwall carbon nanotubes (CNTs) decorated with cobalt oxide (CoOx) nanoparticles (NPs) are prepared in various synthesis conditions to investigate their capability as oxygen reduction reaction (ORR) catalysts for fuel cells in alkaline media. The synthesis conditions include the use of protecting, reducing or complexing agents and heat treatment. Higher ORR activity is possible for smaller size of Co NPs catalysts due to the enlarged interfaces between Co species and CNTs. The addition of polyvinylpyrrolidone (PVP) as protecting agent and NaBH4 during the preparation procedure is necessary for obtaining the highest activity since it favors the formation of lower oxidation states for Co species and the incorporation of N groups which improve ORR activity. CNTs loaded with only 1 wt.% of Co NPs prepared by a facile method using PVP, NaBH4 and subsequent heat treatment at 500 °C under N2 atmosphere, demonstrates both similar catalytic activity and stability than Pt/Vulcan (20 wt.% Pt on Vulcan). The synergic chemical coupling effects between CNTs and CoOx NPs and the presence of carbon material with pyridinic N and quaternary N groups formed from the protecting agent decomposition, seem to be the main factors responsible for the remarkable electrocatalytic activity.es_ES
dc.description.sponsorshipThe authors would like to thank GV and FEDER (PROMETEOII/2014/010), projects CTQ2015-66080-R (MINECO/FEDER), MAT2016-76595-R (MINECO/FEDER), BES-2013-063678 and HEIWA NAKAJIMA FOUNDATION for the financial support.es_ES
dc.rights© 2017 Elsevier B.V.es_ES
dc.subjectOxygen reduction reactiones_ES
dc.subjectCoOx nanoparticleses_ES
dc.subjectCarbon nanotubeses_ES
dc.subjectC-N-Co interactiones_ES
dc.subject.otherQuímica Inorgánicaes_ES
dc.subject.otherQuímica Físicaes_ES
dc.titleKey factors improving oxygen reduction reaction activity in cobalt nanoparticles modified carbon nanotubeses_ES
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