Atomic layer deposition of highly dispersed Pt nanoparticles on a high surface area electrode backbone for electrochemical promotion of catalysis

TitleAtomic layer deposition of highly dispersed Pt nanoparticles on a high surface area electrode backbone for electrochemical promotion of catalysis
Publication TypeJournal Article
Year of Publication2017
AuthorsY. Hajar, V. di Palma, V. Kyriakou, M.A Verheijen, E.A Baranova, P. Vernoux, W.MM Kessels, M. Creatore, M.CM van de Sanden, M.N Tsampas
JournalElectrochemistry Communications
Volume84
IssueSupplement C
Pagination40-44
Date Published11/2017
KeywordsLSM/GDC composite electrode, Propane oxidation
Abstract

A novel catalyst design for electrochemical promotion of catalysis (EPOC) is proposed which overcomes the main bottlenecks that limit EPOC commercialization, i.e., the low dispersion and small surface area of metal catalysts. We have increased the surface area by using a porous composite electrode backbone made of (La0.8Sr0.2)0.95MnO3-δ/Ce0.9Gd0.1O1.95 (LSM/GDC). Highly dispersed Pt nanoparticles with an average diameter of 6.5nm have been deposited on LSM/GDC by atomic layer deposition (ALD). This novel design offers, for the first time, a controllable and reproducible method for the fabrication of EPOC catalysts. The bare electrode backbone shows negligible activity for propane oxidation, while in the presence of Pt nanoparticles a high catalytic activity is obtained above 200°C. The performance of the Pt-loaded LSM/GDC catalyst was significantly improved by application of small currents (I<500μΑ), leading to a 27–33% increase as a function of the open circuit catalytic rate, with apparent Faradaic efficiency values ranging from 1000 to 3860% at 300°C. Our results demonstrate that EPOC is a valid approach for enhancing the catalytic activity of nano-structured catalysts.

DOI10.1016/j.elecom.2017.09.023
Division

MaSF

Department

CEPEA

PIDfed3ab2ee6ec0bedc50e939bbec7093b
Alternate TitleElectrochem. Commun.
LabelOA
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