Reactivity of TiO2 Nanotube-Supported Platinum Particles in the CO Oxidation Reaction

Beitrag in einer Fachzeitschrift
(Originalarbeit)


Details zur Publikation

Autor(en): Krick Calderon S, Grabau M, Yoo JE, Killian M, Schmuki P, Steinrück HP, Papp C
Zeitschrift: ChemCatChem
Jahr der Veröffentlichung: 2017
Band: 9
Heftnummer: 4
Seitenbereich: 564-572
ISSN: 1867-3899


Abstract


The CO oxidation on different platinum model catalysts, in particular differently sized Pt particles on vertically aligned TiO nanotubes (d=80, l=200nm) was investigated by near-ambient-pressure X-ray photoelectron spectroscopy and simultaneous online gas analysis. The results are compared to the behavior on a TiO(110) rutile crystal with a similar Pt coverage and a Pt(111) single crystal. Temperature-programmed reaction experiments at total pressures of 10 to 1.0mbar, and a CO/O ratio of 1:4 were performed to evaluate the reactivity of the samples. The onset temperature of the reaction on the Pt/TiO nanotube samples was found to be lower than on Pt(111) and Pt/TiO(110) and to decrease with decreasing particle size. For all particle samples, a steep increase in reaction rate at a defined temperature was observed, and at high temperatures the reaction became mass transfer-limited in all cases. Isothermal measurements showed that no CO is adsorbed on the particles when CO oxidation has a high activity and metallic platinum is the active catalyst. Ageing of the TiO-supported samples is observed resulting in changes of the reaction onset and CO conversion.



FAU-Autoren / FAU-Herausgeber

Grabau, Mathias
Lehrstuhl für Physikalische Chemie II
Killian, Manuela Dr.-Ing.
Lehrstuhl für Werkstoffwissenschaften (Korrosion und Oberflächentechnik)
Krick Calderon, Sandra
Lehrstuhl für Physikalische Chemie II
Papp, Christian PD Dr.
Lehrstuhl für Physikalische Chemie II
Schmuki, Patrik Prof. Dr.
Lehrstuhl für Werkstoffwissenschaften (Korrosion und Oberflächentechnik)
Steinrück, Hans-Peter Prof. Dr.
Lehrstuhl für Physikalische Chemie II
Yoo, Jeong Eun
Lehrstuhl für Werkstoffwissenschaften (Korrosion und Oberflächentechnik)


Zitierweisen

APA:
Krick Calderon, S., Grabau, M., Yoo, J.E., Killian, M., Schmuki, P., Steinrück, H.-P., & Papp, C. (2017). Reactivity of TiO2 Nanotube-Supported Platinum Particles in the CO Oxidation Reaction. ChemCatChem, 9(4), 564-572. https://dx.doi.org/10.1002/cctc.201600913

MLA:
Krick Calderon, Sandra, et al. "Reactivity of TiO2 Nanotube-Supported Platinum Particles in the CO Oxidation Reaction." ChemCatChem 9.4 (2017): 564-572.

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Zuletzt aktualisiert 2018-08-11 um 13:50