Interpretation of the x-ray photoemission spectra of cobalt oxides and cobalt oxide surfaces

Catalysis on singly dispersed bimetallic sites

“…This peak is attributed to the characteristic satellite peak of Co 2p 3/2 of Co 2 þ in an octahedral coordination with oxygen atoms in CoO at 786.4 eV (refs 14,15). Thus, by referring to the characteristic satellite peak of Co 2p 3/2 of CoO reported in literature 14,15 , the photoemission feature of Co 2p 3/2 collected at 300°C in 5% H 2 is assigned to CoO. In addition, the formation of CoO is also supported by the O/Co atomic ratio of the catalyst experiencing a reduction at 300°C in 5% H 2 , 0.80 (Fig.…”

Solar absorptance of copper–cobalt oxide thin film coatings with nano-size, grain-like morphology: Optimization and synchrotron radiation XPS studies

“…The decoupling of the three O 1s spectra generally gives four curve-fitting components in the spectrum from each sample. The peaks (labelled "i") at binding energy (BE) around 529.4-529.6 eV could be attributed to lattice O 2-(Cu-O, Co-O) [6,8,21], the peaks (denoted "ii") at BE around 530.5-530.8 eV may be treated as the surface oxygen from a wide variation of species such as adsorbed oxygen O -and/or OH -like species, as hydroxyl, carbonate groups, etc [6,8,[22][23][24][25], while the adjacent peaks (labelled "iii" and "iv") at BE around = 531.4-531.5 eV and at BE around 531.8-532.0 eV, respectively, could be assigned as subsurface O -species [26,27]. A relatively flat peak shoulder in the high energy side of O 1s peak (Fig.…”

Adsorption of cobalt (II) 5,10,15,20-tetrakis(2-aminophenyl)-porphyrin onto copper substrates: Characterization and impedance studies for corrosion inhibition

“…The binding energy shift in the Co2p spectrum for the Co(II)(T(o-NH 2 )PP) can be attributed to cobalt in the formal oxidation state +2. The Co2p3/2 peak appears at 780.8 eV and the Co2p1/2 peak is observed at 795.6 eV [30][31]. The Co2p3/2 signal shows two peaks due to a multiplet structure, which is caused by the unpaired electron in the d-shell of the Co(II)-ion (d 7 electron structure) considering spin-orbit and electrostatic electron-electron interactions [19].…”