Open AccessNO Binding Energies to and Diffusion Barrier on Pd Obtained with Velocity-Resolved Kinetics
Author(s) -
Dmitriy Borodin,
Igor Rahinov,
Jan Fingerhut,
Michael Schwarzer,
Stefan Hörandl,
Georgios Skoulatakis,
Dirk Schwarzer,
Theofanis N. Kitsopoulos,
Alec M. Wodtke
Publication year - 2021
Publication title -
the journal of physical chemistry c
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.401
H-Index - 289
eISSN - 1932-7455
pISSN - 1932-7447
DOI - 10.1021/acs.jpcc.1c02965
Subject(s) - desorption , kinetics , transition state theory , binding energy , dissociation (chemistry) , diffusion , activation energy , chemistry , diffusion barrier , surface diffusion , receptor–ligand kinetics , atomic physics , materials science , analytical chemistry (journal) , chemical physics , thermodynamics , nanotechnology , adsorption , reaction rate constant , physics , quantum mechanics , layer (electronics) , chromatography
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 Δ E ST = 0.060 -0.030 +0.015 eV. These parameters provide valuable benchmarks for theory.
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