Electrochemical promotion of catalysis with highly dispersed Pt nanoparticles

Anastasios Kambolis (1) , Leonardo Lizarraga (1) , Michail N. Tsampas (1) , Laurence Burel (1) , Mathilde Rieu (2, 3, 4) , Jean-Paul Viricelle (2, 3, 4) , Philippe Vernoux (1)

1 IRCELYON - Institut de recherches sur la catalyse et l'environnement de Lyon
2 SPIN-ENSMSE - Centre Sciences des Processus Industriels et Naturels
3 PRESSIC-ENSMSE - Procédés et REactivité des Systèmes Solide-gaz, Instrumentation et Capteurs
4 LPMG-EMSE - Laboratoire des Procédés en Milieux Granulaires

Pt nanoparticles were dispersed in the porosity of a LSCF-GDC electrode interfaced on a dense GDC membrane. Small positive polarizations can strongly increase (38%-enhancement) the catalytic performance of Pt nanoparticles for propane deep oxidation at low temperatures with apparent Faradaic efficiency values up to 85. This study clearly demonstrates that the catalytic activity of metallic nanoparticles dispersed in the porosity of a mixed ionic electronic conducting electrode can be strongly electropromoted.

Mots clés: Electrochemical promotion; NEMCA effect; Pt nanoparticles; LSCF/GDC electrode; Post impregnation

Domaines: Génie des procédés

Anastasios Kambolis, Leonardo Lizarraga, Michail N. Tsampas, Laurence Burel, Mathilde Rieu, et al.. Electrochemical promotion of catalysis with highly dispersed Pt nanoparticles. Electrochemistry Communications, 2012, 12, pp.5-8. ⟨10.1016/j.elecom.2012.02.041⟩. ⟨hal-00683898⟩