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

Krick Calderon S, Grabau M, Yoo JE, Killian M, Schmuki P, Steinrück HP, Papp C (2017)


Publication Status: Published

Publication Type: Journal article, Original article

Publication year: 2017

Journal

Book Volume: 9

Pages Range: 564-572

Journal Issue: 4

DOI: 10.1002/cctc.201600913

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.

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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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