Spectroscopic evidence for Ag(III) in highly oxidized silver films by x-ray photoelectron spectroscopy

Journal Article · Thu Dec 16 04:00:00 EST 2010 · Journal of Physical Chemistry. C

DOI:https://doi.org/10.1021/jp107914e· OSTI ID:1001105

Kaspar, Tiffany C.; Droubay, Timothy C.; Chambers, Scott A.; Bagus, Paul S.

In situ x-ray photoelectron spectroscopy (XPS) was utilized to identify the chemical state of silver in a range of silver oxide thin films obtained by co-deposition of silver and atomic oxygen. A highly oxidized silver species was observed at an unexpectedly low Ag 3d5/2 binding energy (BE) of 366.8 eV with an associated broad satellite at 368.2 eV; this species was assigned as Ag(III). It was found to be highly unstable in vacuum, but could be regenerated by further exposure to atomic oxygen. Both BE shifts and intensity changes of the O 1s peak were found to correlate with changes in the silver oxidation state. Theoretical calculations of the expected XPS of high spin Ag(III) provide insight into the significance of satellite structure and shake features in the Ag 3d spectra.

• Research Organization: Pacific Northwest National Laboratory (PNNL), Richland, WA (US), Environmental Molecular Sciences Laboratory (EMSL)
• Sponsoring Organization: USDOE
• DOE Contract Number: AC05-76RL01830
• OSTI ID: 1001105
• Report Number(s): PNNL-SA-74545; 35197; KC0203020
• Journal Information: Journal of Physical Chemistry. C, Journal Name: Journal of Physical Chemistry. C Journal Issue: 49 Vol. 114; ISSN 1932-7447
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
BINDING ENERGY
CHEMICAL STATE
Environmental Molecular Sciences Laboratory
OXYGEN
SATELLITES
SILVER
SILVER OXIDES
SPECTRA
SPIN
THIN FILMS
VALENCE
X-RAY PHOTOELECTRON SPECTROSCOPY