Tuning the Pt/CeO2 Interface by in Situ Variation of the Pt Particle Size
Andreas M Gänzler
1
,
Maria Casapu
1
,
F Maurer
1
,
Heike Störmer
2
,
Dagmar Gerthsen
2
,
Géraldine Ferré
3
,
Philippe Vernoux
3
,
Benjamin Bornmann
4
,
Ronald Frahm
4
,
Vadim Murzin
5
,
Maarten Nachtegaal
6
,
M. Votsmeier
7
,
3
7
Umicore AG & Co. KG, Rodenbacher Chaussee 4, 63457 Hanau, Germany
|
Publication type: Journal Article
Publication date: 2018-04-12
scimago Q1
wos Q1
SJR: 3.782
CiteScore: 19.5
Impact factor: 13.1
ISSN: 21555435
General Chemistry
Catalysis
Abstract
Pt-CeO2-Al2O3 catalysts play an important role in diesel oxidation and three-way catalysis. In this study, the fast structural dynamics of both platinum and ceria in a 1 wt %Pt/5 wt %CeO2-Al2O3 catalyst prepared by flame spray pyrolysis have been systematically investigated under reducing and oxidizing conditions to elucidate the role of the Pt–CeO2 interface for CO oxidation and fast oxygen storage/release of ceria. The catalyst showed enhanced catalytic activity, particularly after application of a reducing/oxidizing conditioning step at 250 °C, with a pronounced dependence on the reducing agent (C3H6 < H2 < CO). In situ time-resolved X-ray absorption spectroscopy (XAS) at the Ce L3-edge unraveled a dependence of the reduction extent of ceria during temperature-programmed reduction on the noble metal constituent and the applied reducing agent. Dynamic reducing/oxidizing cycling (2% H2 ↔ 10% O2 or 2% CO ↔ 10% O2) at various temperatures (150, 250, and 350 °C) showed that the reducibility of ceria increas...
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Gänzler A. M. et al. Tuning the Pt/CeO2 Interface by in Situ Variation of the Pt Particle Size // ACS Catalysis. 2018. Vol. 8. No. 6. pp. 4800-4811.
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Gänzler A. M., Casapu M., Maurer F., Störmer H., Gerthsen D., Ferré G., Vernoux P., Bornmann B., Frahm R., Murzin V., Nachtegaal M., Votsmeier M., Grunwaldt J. Tuning the Pt/CeO2 Interface by in Situ Variation of the Pt Particle Size // ACS Catalysis. 2018. Vol. 8. No. 6. pp. 4800-4811.
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RIS
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TY - JOUR
DO - 10.1021/acscatal.8b00330
UR - https://doi.org/10.1021/acscatal.8b00330
TI - Tuning the Pt/CeO2 Interface by in Situ Variation of the Pt Particle Size
T2 - ACS Catalysis
AU - Gänzler, Andreas M
AU - Casapu, Maria
AU - Maurer, F
AU - Störmer, Heike
AU - Gerthsen, Dagmar
AU - Ferré, Géraldine
AU - Vernoux, Philippe
AU - Bornmann, Benjamin
AU - Frahm, Ronald
AU - Murzin, Vadim
AU - Nachtegaal, Maarten
AU - Votsmeier, M.
AU - Grunwaldt, Jan-Dierk
PY - 2018
DA - 2018/04/12
PB - American Chemical Society (ACS)
SP - 4800-4811
IS - 6
VL - 8
SN - 2155-5435
ER -
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BibTex (up to 50 authors)
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@article{2018_Gänzler,
author = {Andreas M Gänzler and Maria Casapu and F Maurer and Heike Störmer and Dagmar Gerthsen and Géraldine Ferré and Philippe Vernoux and Benjamin Bornmann and Ronald Frahm and Vadim Murzin and Maarten Nachtegaal and M. Votsmeier and Jan-Dierk Grunwaldt},
title = {Tuning the Pt/CeO2 Interface by in Situ Variation of the Pt Particle Size},
journal = {ACS Catalysis},
year = {2018},
volume = {8},
publisher = {American Chemical Society (ACS)},
month = {apr},
url = {https://doi.org/10.1021/acscatal.8b00330},
number = {6},
pages = {4800--4811},
doi = {10.1021/acscatal.8b00330}
}
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MLA
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Gänzler, Andreas M., et al. “Tuning the Pt/CeO2 Interface by in Situ Variation of the Pt Particle Size.” ACS Catalysis, vol. 8, no. 6, Apr. 2018, pp. 4800-4811. https://doi.org/10.1021/acscatal.8b00330.