Gold – XPS Analysis - Cardiff University
There is a lot of current interest in the chemistry and especially the catalysis of gold, therefore there is a great interest in the reliable assignment of metallic and ionic gold species in XPS. Typical Au (4f 7/2) binding energies are given below: Metallic Au: 84.0 eV. Au (I): ca. 85.0 eV. Au (III): ca. 86.0 eV.
Gold | XPS Periodic Table | Thermo Fisher Scientific - US
Gold X-ray photoelectron spectra, gold electron configuration, and other elemental information. Au4f region has well-separated spin-orbit components (Δ=3.7eV). Peaks in the Au4f region have an asymmetric peak shape. The Au4f 7/2 peak can …
High-resolution Au4f XPS spectrum of Au nanoparticles
The Au 4f XPS (Fig. 7d) spectra exhibited a lower-energy band (Au 4f 7/2 ) observed at 84.3 eV, while the higher-energy band (Au 4f 5/2 ) appeared at 87.9 eV, both indicative of Au (0) species.
Gold Spectra – Au metal - XPS Database
The XPS Spectra section provides raw and processed survey spectra, chemical state spectra, BE values, FWHM values, and overlays of key spectra. Atom% values from surveys are based on sample, as received, and Scofield cross-sections.
XPS study of supported gold catalysts: the role of Au0 and Au…
Mar 29, 2006 · The higher activity of Au/CeO 2 (DP) catalysts at T ≈ 250 K can be ascribed to a better stabilization of the AuO − species by the cerium oxide. Nanosized metallic gold particles exhibit a worse catalytic performance, both on ‘reducible’ and ‘inert’ supports, being significantly active only in the temperature range: 400–600 K ...
X-ray Photoelectron Spectroscopy (XPS) Reference Pages: Gold
X-ray photoelectron spectroscopy (XPS or ESCA) curve fitting procedures, reference materials and useful notes are listed here to provide a starting point for the consistent interpretation of XPS spectra.
Size-dependent XPS spectra of small supported Au-clusters
Feb 1, 2013 · High resolution XPS spectra (4f) of mass-selected Au N -clusters supported by a thin natural silica layer are presented in the size range N = 1–35 atoms per cluster. The XPS binding energy as well as peak width is found to increase …
The Au (4f) XPS spectra of the Au nanoparticles. (a) The Au (4f) XPS ...
We simulated the extinction spectra of Ag–Au alloyed nanoparticles produced by pulsed laser ablation in liquid of elemental targets followed by re-irradiation of suitable mixtures of the...
XPS characterization of Au/TiO2 catalysts: Binding energy …
Jan 4, 2011 · X-ray photoelectron spectroscopy (XPS) was employed to study the surface composition and electronic structure of Au/TiO 2 catalysts in comparison with TiO 2 (anatase) and to reveal time-dependent X-ray irradiation damage of the samples.
= Au] Sum of 15 repetitive etch/scans Date: Fri Feb 25 1994