Growth of Stable Surface Oxides on Pt(111) at Near-Ambient Pressures

Beitrag in einer Fachzeitschrift
(Originalarbeit)


Details zur Publikation

Autor(en): Fantauzzi D, Krick Calderon S, Mueller JE, Grabau M, Papp C, Steinrück HP, Senftle TP, van Duin ACT, Jacob T
Zeitschrift: Angewandte Chemie (International ed. in English)
Verlag: Wiley-VCH Verlag
Jahr der Veröffentlichung: 2017
Band: 56
Heftnummer: 10
Seitenbereich: 2594-2598
ISSN: 1521-3773
Sprache: Englisch


Abstract


Detailed knowledge of the structure and degree of oxidation of platinum surfaces under operando conditions is essential for understanding catalytic performance. However, experimental investigations of platinum surface oxides have been hampered by technical limitations, preventing in situ investigations at relevant pressures. As a result, the time-dependent evolution of oxide formation has only received superficial treatment. In addition, the amorphous structures of many surface oxides have hindered realistic theoretical studies. Using near-ambient pressure X-ray photoelectron spectroscopy (NAP-XPS) we show that a time scale of hours (t≥4 h) is required for the formation of platinum surface oxides. These experimental observations are consistent with ReaxFF grand canonical Monte Carlo (ReaxFF-GCMC) calculations, predicting the structures and coverages of stable, amorphous surface oxides at temperatures between 430–680 K and an O partial pressure of 1 mbar.



FAU-Autoren / FAU-Herausgeber

Grabau, Mathias
Lehrstuhl für Physikalische Chemie II
Krick Calderon, Sandra
Sonderforschungsbereich 953/2 Synthetische Kohlenstoffallotrope
Papp, Christian PD Dr.
Lehrstuhl für Physikalische Chemie II
Steinrück, Hans-Peter Prof. Dr.
Lehrstuhl für Physikalische Chemie II


Zusätzliche Organisationseinheit(en)
Exzellenz-Cluster Engineering of Advanced Materials


Autor(en) der externen Einrichtung(en)
Pennsylvania State University (Penn State)
Princeton University
Universität Ulm


Zitierweisen

APA:
Fantauzzi, D., Krick Calderon, S., Mueller, J.E., Grabau, M., Papp, C., Steinrück, H.-P.,... Jacob, T. (2017). Growth of Stable Surface Oxides on Pt(111) at Near-Ambient Pressures. Angewandte Chemie (International ed. in English), 56(10), 2594-2598. https://dx.doi.org/10.1002/anie.201609317

MLA:
Fantauzzi, Donato, et al. "Growth of Stable Surface Oxides on Pt(111) at Near-Ambient Pressures." Angewandte Chemie (International ed. in English) 56.10 (2017): 2594-2598.

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Zuletzt aktualisiert 2018-06-08 um 19:41