Journalartikel

Jahr der Veröffentlichung: 2010

Seiten: 328-337

Zeitschrift: Applied Catalysis B: Environment and Energy

Bandnummer: 100

Heftnummer: 1-2

ISSN: 0926-3373

DOI Link: https://doi.org/10.1016/j.apcatb.2010.08.009

Verlag: Elsevier

Abstract: 
The electrochemical promotion of ethylene oxidation on Pt was investigated using Pt(1 1 1) thin film model catalyst-electrodes deposited on top of YSZ(1 1 1) single crystals. This is the first study involving a thin epitaxial and well-characterized catalyst system. The nearly covering Pt films were prepared by pulsed laser deposition (PLD) and characterized by scanning electron microscopy (SEM), energy dispersive X-ray spectroscopy (EDX), and X-ray diffraction (XRD). In order to explore the influence of potentially catalytic active impurities, samples with and without FeOx dopants on the Pt catalyst surface were investigated. A major result is that most of the samples showed unequivocal electrochemical promotion of catalytic activity (EPOC). The Faradaic efficiency values Lambda are typically 2.5-77 which is considerably smaller than those reported for usually investigated macroscopically porous paste electrodes (Lambda(max) = 3 x 10(5)). This fact can be attributed to the much shorter three-phase boundary (tpb) length of the catalyst films. The iron-doped samples showed a permanent effect (P-EPOC). The results are discussed in terms of morphology changes and iron-doping effects. A short survey of EPOC studies using different catalyst/electrolyte preparation techniques is given.

Harvard-Zitierstil: Mutoro, E., Koutsodontis, C., Luerssen, B., Brosda, S., Vayenas, C. and Janek, J. (2010) Electrochemical promotion of Pt(111)/YSZ(111) and Pt-FeOx/YSZ(111) thin catalyst films: Electrocatalytic, catalytic and morphological studies, Applied Catalysis B: Environment and Energy, 100(1-2), pp. 328-337. https://doi.org/10.1016/j.apcatb.2010.08.009

APA-Zitierstil: Mutoro, E., Koutsodontis, C., Luerssen, B., Brosda, S., Vayenas, C., & Janek, J. (2010). Electrochemical promotion of Pt(111)/YSZ(111) and Pt-FeOx/YSZ(111) thin catalyst films: Electrocatalytic, catalytic and morphological studies. Applied Catalysis B: Environment and Energy. 100(1-2), 328-337. https://doi.org/10.1016/j.apcatb.2010.08.009