<div class="csl-bib-body">
<div class="csl-entry">Lewis, F. J., Rafsanjani Abbasi, A., Meier, M., Schmid, M., Diebold, U., & Parkinson, G. (2024, March 20). <i>Extended support structure dictates the reactivity of model single-atom catalysts for dissociative oxygen adsorption</i> [Conference Presentation]. 87. Jahrestagung der DPG und DPG-Frühjahrstagung, Berlin, Germany.</div>
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dc.identifier.uri
http://hdl.handle.net/20.500.12708/196031
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dc.description.abstract
A goal of single-atom catalysis (SAC) is to find a support that stabilizes single metal adatoms in geometries that make them catalytically active.1 For this to be possible, the adatoms must be able to change their coordination state by forming and breaking bonds. Iron oxides are popular supports used in SAC because of their low cost, chemical stability, and non-toxicity.2 Given its ubiquity in catalysis, platinum is an attractive metal to be used in SAC.
I will discuss the similarities and differences between Pt adatoms on hematite, α-Fe2O3(012)-(1x1), and magnetite, Fe3O4(001). Scanning tunneling microscopy (STM), x-ray photoelectron spectroscopy (XPS), and density functional theory (DFT) were used to characterize these surfaces and how Pt atoms bind to them. In both cases, Pt is 2-fold coordinated to lattice oxygen atoms, but the reactivity differs. Interestingly, we find that the second coordination sphere plays an important role defining the reactivity to molecular oxygen.
en
dc.language.iso
en
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dc.subject
Surface Physics
en
dc.title
Extended support structure dictates the reactivity of model single-atom catalysts for dissociative oxygen adsorption