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Quantifying metal support interaction in ceria-supported Pt, PtSn and Ru nanoparticles using electrochemical technique

DOITrouver le DOI : https://doi.org/10.1016/j.jcat.2015.10.015
AuteurRechercher : ; Rechercher : ; Rechercher : 1; Rechercher :
Affiliation
  1. Conseil national de recherches Canada. Énergie, les mines et l'environnement
FormatTexte, Article
SujetCerium compounds; Ethylene; Interfaces (materials); Metal nanoparticles; Metals; Nanoparticles; Platinum; Polarization; Electrochemical promotion; Electrochemical techniques; Ethylene oxidation; Exchange current densities; Faradaic efficiencies; Metal-support interactions; Polarization curves; Polarization measurements; Ruthenium
Résumé
Electrochemical promotion and metal-support interaction (MSI) have long been viewed as two separate phenomena; however, more recently it has been shown that, functionally, for ionic and mixed ionic-electronic conducting materials, both are linked by the transfer of ionic species at the interfaces. The purpose of this study was to exhibit a relationship between these two concepts through the use of an electrochemical technique to evaluate CeO2-supported Pt- and Ru-based nanoparticles. The presence of ceria was found to increase the reaction rate when compared to free-standing Pt and Ru nanoparticles with the metal-support interaction rate enhancement ratios, ρMSI, up to 14. Polarization measurements established that higher exchange current density, i0, values correspond to lower open circuit catalytic rates. An apparent self-induced Faradaic efficiency was proposed and determined for each catalyst; lowest value (|ΛMSI| =1053) corresponded to 1 wt% Pt-1/CeO2.
Date de publication
Dans
  • Journal of Catalysis 333 (18 novembre 2015) : 40–50.
Langueanglais
Publications évaluées par des pairsOui
Numéro NPARC21277458
Exporter la noticeExporter en format RIS
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Identificateur de l’enregistremente31c5343-4a13-4713-8f1f-8766643e2eba
Enregistrement créé2016-03-09
Enregistrement modifié2020-04-22

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