Associative oxygen species on the oxidized silver surface formed under O2 microwave excitation

The silver–oxygen system in catalysis: new insights by near ambient pressure X-ray photoelectron spectroscopy

“…Species on this range were also observed for Ag(001) single crystals exposed to O 2 below room temperature 38 and silver foils exposed to microwave discharges in the presence of O 2 at room temperature. 40,41 Both species Oa 2 and Oa 3 have FHWM around 1 eV in the same range as Oa 1 . For an overview of all the O species described in this paper we refer the reader to Table 1 in the discussion section.…”

Structure, conductivity, and optical absorption of Ag2−xO films

“…Other reported forms of silver oxide include the AgO, Ag 3 O 4 , and Ag 4 O 3 , and Ag 2 O 3 phases, all of which are less thermodynamically stable than Ag 2 O [7]. Silver oxide films (Ag 2 O and/ or AgO) have been fabricated over the past decade using several different techniques including magnetron sputtering [7][8][9], chemical bath deposition [10], ECR oxygen plasma assisted e-beam evaporation of Ag [11], and post-deposition oxygen plasma processing of Ag surfaces [12][13][14][15][16]. Because each of the silver oxide phases, including Ag 2 O, are relatively unstable in air and sensitive to contamination under different ambient conditions, there has been some disagreement about the exact stoichiometries, crystalline phases, and properties of silver oxide films.…”

Friction anisotropy in boronated graphite

“…11a). It is observed that in ambient atmosphere, virgin BG surface interacts with oxygen and water vapour forming C O C and C OH chemical components [41]. The detail of the spectra is pointed out in the Table 4.…”

“…11c). These components belong to carbonate structure, hydroxyl, carboxyl and water molecules [41,42]. This indicates BG surface is more chemically active in this direction due to large amount of dangling bonds.…”

“…hydroxyl group. This is the signature of oxygen in the hydroxyl groups [41,42] and it is typical of molecular oxygen species. Due to dissipation of thermal and frictional energy, several chemical components are formed in the wear track of basal face (Fig.…”