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Probing the effect of surface strain on CO binding to Pd thin films.

MPG-Autoren
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Hahn,  H.
Department of Dynamics at Surfaces, MPI for Biophysical Chemistry, Max Planck Society;

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Neugebohren,  J.
Department of Dynamics at Surfaces, MPI for Biophysical Chemistry, Max Planck Society;

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Kitsopoulos,  T. N.
Department of Dynamics at Surfaces, MPI for biophysical chemistry, Max Planck Society;

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Wodtke,  A. M.
Department of Dynamics at Surfaces, MPI for biophysical chemistry, Max Planck Society;

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Zitation

Harding, D. J., Bongers, M. D., Wagner, S., Hahn, H., Neugebohren, J., Kitsopoulos, T. N., et al. (2019). Probing the effect of surface strain on CO binding to Pd thin films. The Journal of Physical Chemistry C, 123(19), 12255-12260. doi:10.1021/acs.jpcc.9b01435.


Zitierlink: https://hdl.handle.net/21.11116/0000-0003-969B-5
Zusammenfassung
We report measurements to investigate the effects of mechanical strain on the binding energy of carbon monoxide (CO) on the (111) surface of a 16 nm thin film of palladium (Pd) grown on rutile titanium dioxide (r-TiO2). The lattice mismatch between Pd and the r-TiO2 leads to a tensile mechanical in-plane stress in the Pd layer of approximately 0.38 GPa. We observe an increase of (40 ± 10) kJ mol–1 in the CO binding energy for the 16 nm sample compared to a bulk Pd(111) crystal, which is in qualitative agreement with expectations based on the d-band model.