Effect of Surface Composition on Electronic Structure, Stability, and Electrocatalytic Properties of Pt-Transition Metal Alloys: Pt-Skin versus Pt-Skeleton Surfaces
Argonne National Laboratory · Lawrence Berkeley National Laboratory
Abstract
The surface properties of PtM (M = Co, Ni, Fe) polycrystalline alloys are studied by utilizing Auger electron spectroscopy, low energy ion scattering spectroscopy, and ultraviolet photoemission spectroscopy. For each alloy initial surface characterization was done in an ultrahigh vacuum (UHV) system, and depending on preparation procedure it was possible to form surfaces with two different compositions. Due to surface segregation thermodynamics, annealed alloy surfaces form the outermost Pt-skin surface layer, which consists only platinum atoms, while the sputtered surfaces have the bulk ratio of alloying components. The measured valence band density of state spectra clearly shows the differences in electronic…
Citation impact
- FWCI
- 20.20
- Percentile
- 100%
- References
- 26
Authors
5- VRVojislav R. StamenkovićCorresponding
Argonne National Laboratory, Lawrence Berkeley National Laboratory
- BSBongjin Simon Mun
Lawrence Berkeley National Laboratory, Argonne National Laboratory
- KJKarl J. J. Mayrhofer
Lawrence Berkeley National Laboratory, Argonne National Laboratory
- PNPhilip N. Ross
Lawrence Berkeley National Laboratory, Argonne National Laboratory
- NMNenad M. Marković
Argonne National Laboratory, Lawrence Berkeley National Laboratory
Topics & keywords
- Chemistry
- Auger electron spectroscopy
- Transition metal
- Bimetallic strip
- Platinum
- X-ray photoelectron spectroscopy
- Crystallite
- Fermi level