NO Binding Energies to and Diffusion Barrier on Pd Obtained with Velocity-Resolved Kinetics

[Image: see text] We report nitric oxide (NO) desorption rates from Pd(111) and Pd(332) surfaces measured with velocity-resolved kinetics. The desorption rates at the surface temperatures from 620 to 800 K span more than 3 orders of magnitude, and competing processes, like dissociation, are absent....

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Detalles Bibliográficos
Autores principales: Borodin, Dmitriy, Rahinov, Igor, Fingerhut, Jan, Schwarzer, Michael, Hörandl, Stefan, Skoulatakis, Georgios, Schwarzer, Dirk, Kitsopoulos, Theofanis N., Wodtke, Alec M.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: American Chemical Society 2021
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8279706/
https://www.ncbi.nlm.nih.gov/pubmed/34276859
http://dx.doi.org/10.1021/acs.jpcc.1c02965
Descripción
Sumario:[Image: see text] We report nitric oxide (NO) desorption rates from Pd(111) and Pd(332) surfaces measured with velocity-resolved kinetics. The desorption rates at the surface temperatures from 620 to 800 K span more than 3 orders of magnitude, and competing processes, like dissociation, are absent. Applying transition state theory (TST) to model experimental data leads to the NO binding energy E(0) = 1.766 ± 0.024 eV and diffusion barrier D(T) = 0.29 ± 0.11 eV on the (111) terrace and the stabilization energy for (110)-steps ΔE(ST) = 0.060(–0.030)(+0.015) eV. These parameters provide valuable benchmarks for theory.

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