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The effect of surface strain on the CO-poisoned surface of Pt electrode for hydrogen adsorption
Publikationstyp
Journal Article
Date Issued
2017-04-28
Sprache
English
TORE-URI
Journal
Volume
350
Start Page
212
End Page
217
Citation
Journal of Catalysis (350): 212-217 (2017)
Publisher DOI
Scopus ID
Publisher
Elsevier
The impact of mechanical strain is studied at CO-poisoned Pt(1 1 1) surface for hydrogen adsorption. Our experiment first investigates a coupling parameter of interest, ζH, which quantifies the variation of hydrogen adsorption potential in response to surface strain. The result exhibits a bigger ζH at CO-poisoned surface than the value measured at clean surface. Since adsorption potential is linked to adsorption energy, it indicates significantly the larger effect of tensile strain on decreasing hydrogen adsorption energy at CO-poisoned surface, comparing to the clean surface. DFT calculations at an atomic level support the experimental observation and explain this behavior can be attributed to the strain-induced reduction in CO-poisoning effect on hydrogen adsorption energy.
Subjects
chemo-mechanical coupling
CO-poisoned surface
CO-poisoning effect
density functional theory
hydrogen adsorption energy
tensile strain
DDC Class
530: Physik