Kinetic isotope effects and reaction intermediates in the decomposition of methyl on flat and stepped platinum (1 1 1) surfaces

Papp C, Fuhrmann T, Tränkenschuh B, Denecke R, Steinrück HP (2007)


Publication Type: Journal article

Publication year: 2007

Journal

Original Authors: Papp C., Fuhrmann T., Tränkenschuh B., Denecke R., Steinrück H.-P.

Publisher: Elsevier

Book Volume: 442

Pages Range: 176-181

DOI: 10.1016/j.cplett.2007.06.023

Abstract

We investigated the thermal evolution of methyl on Pt(1 1 1), Pt(3 2 2) and Pt(3 5 5) by in situ X-ray photoelectron spectroscopy. The dehydrogenation to methylidyne shows a pronounced kinetic isotope effect, with the characteristic temperature higher by 16 K for CD than for CH. The resulting difference in activation energies, 48 meV, agrees well with the difference in the zero point energies of the C-H and C-D stretching vibrations. For the stepped surfaces an enhanced reactivity is found. While dehydrogenation of methyl on Pt(3 2 2) at step and terrace sites occurs at the same temperature, for Pt(3 5 5) the steps are even more reactive. © 2007 Elsevier B.V. All rights reserved.

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APA:

Papp, C., Fuhrmann, T., Tränkenschuh, B., Denecke, R., & Steinrück, H.-P. (2007). Kinetic isotope effects and reaction intermediates in the decomposition of methyl on flat and stepped platinum (1 1 1) surfaces. Chemical Physics Letters, 442, 176-181. https://dx.doi.org/10.1016/j.cplett.2007.06.023

MLA:

Papp, Christian, et al. "Kinetic isotope effects and reaction intermediates in the decomposition of methyl on flat and stepped platinum (1 1 1) surfaces." Chemical Physics Letters 442 (2007): 176-181.

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