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 6.5 nm 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 < 500 μΑ), 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.

Hajar, Y., Di Palma, V., Kyriakou, V., Verheijen, M., Baranova, E., Vernoux, P., et al. (2017). Atomic layer deposition of highly dispersed Pt nanoparticles on a high surface area electrode backbone for electrochemical promotion of catalysis. ELECTROCHEMISTRY COMMUNICATIONS, 84, 40-44 [10.1016/j.elecom.2017.09.023].

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

Di Palma, V.
Co-primo
;
2017

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 6.5 nm 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 < 500 μΑ), 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.
Articolo in rivista - Articolo scientifico
Atomic layer deposition; Electrochemical promotion of catalysis; LSM/GDC composite electrode; Propane oxidation; Pt-nanoparticles;
English
2017
84
40
44
reserved
Hajar, Y., Di Palma, V., Kyriakou, V., Verheijen, M., Baranova, E., Vernoux, P., et al. (2017). Atomic layer deposition of highly dispersed Pt nanoparticles on a high surface area electrode backbone for electrochemical promotion of catalysis. ELECTROCHEMISTRY COMMUNICATIONS, 84, 40-44 [10.1016/j.elecom.2017.09.023].
File in questo prodotto:
File Dimensione Formato  
Hajar-2017-Electrochem Comm-VoR.pdf

Solo gestori archivio

Tipologia di allegato: Publisher’s Version (Version of Record, VoR)
Licenza: Tutti i diritti riservati
Dimensione 597.43 kB
Formato Adobe PDF
597.43 kB Adobe PDF   Visualizza/Apri   Richiedi una copia

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10281/461322
Citazioni
  • Scopus 17
  • ???jsp.display-item.citation.isi??? 17
Social impact