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Learn about the X-ray photoelectron spectra, electron configuration, and other properties of oxygen, a non-metal element. Find out how to interpret O1s peaks, quantify oxygen states, and use O1s for band gap measurement.
X-ray photoelectron spectroscopy (XPS) is widely used to determine the chemical and electronic states of atoms within a material. However, it is often complex to interpret the O 1s region in metal oxides, where an ∼531 eV binding energy feature appears between lattice oxygen (∼530 eV) and oxygen-containing surface species (∼532 eV). This feature has been vaguely ascribed to oxygen ...
As seen in the figure above, the O1s has the largest peak, and it shows that the atomic composition of oxygen is the greatest. The greater the binding energy, the greater the attraction of that electron to the nucleus. i.e. peaks from electrons in 1s will have a greater energy than peaks representing electrons from 2s.
X-Ray Photoelectron Spectroscopy AnalysisCommon oxygen, O (1s) binding energies: Many (pure) oxide samples exhibit a secondary structure to higher binding energy of the main lattice oxygen peak. Careful consideration of the sample history can aid in the identification of this peak. Commonly, this may be ascribed to surface hydroxyl (OH) groups or even defects in the metal oxide lattice ...
Learn about the binding energy range of oxygen in organic compounds from XPS spectra. See a table of common O 1s values and a reference for more details.
The author challenges the common attribution of an XPS O1s signal at about 531-532 eV to oxygen vacancies in photo- and electro-catalysts for water splitting and other materials applications. He argues that this signal is that of adventitious hydroxyls of water and that oxygen vacancies cannot exist in ambient conditions.
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X-ray photoelectron spectroscopy (XPS) is a widely-used experimental technique for probing ionic environments in solids. Under X-ray bombardment, the kinetic energies of photoelectrons emitted from core states reveal information about the oxidation state of the parent ions as well as the surrounding material environment.
Characterization of the surface of iridium oxide (IrOx) materials is of crucial importance to understand catalysts for the oxygen evolution reaction (OER) in low-temperature water electrolysis. While much of our current knowledge is based on well-defined single-crystal surfaces, surface-sensitive techniques like X-ray photoelectronic spectroscopy (XPS) are relevant to characterize the ...
XPS O1s core-level peak-shape with increasing alloy composition, x. Based on XPS studies of bulk sodium-silicate, TM doped sodium-silicate, and lead-silicate glasses, it has been established that the shape of the XPS O1s core-level feature reflects the distributions of the different local O-atom bonding environments [21-22].