Understanding of binding energy calibration in XPS of lanthanum oxide by in situ treatment

Abstract

La compounds photoelectron spectra calibration using La 4d5/2 peak as internal standard is proposed. This is demonstrated by characterizing different La compounds formed after in situ treatments on a nanorod La2O3 catalyst.

Copper‐Lanthanum Catalysts for NOx and Soot Removal

“…The O1s spectra of the copper-containing catalysts are more complex than those of the copper-free catalysts, and an additional peak is observed at 528.7 eV that has been assigned to the La 2 CuO 4 spinel, [23] in agreement with the X-ray diffractograms. The differences in the position and area of this peak in CuLa-conv and CuLa-template can be attributed to differences in the interaction between copper and lanthanum species.…”

“…This is consistent with the lanthanum interaction with both copper and oxygen in the La 2 CuO 4 spinel. [23] Note also that this widening and shift is greater in the case of CuLa-template sample regarding CuLaconv, which corroborates again the higher interaction between the copper-containing phase and the lanthanum support caused by the macroporosity of La-template.…”

Highly crystalline anatase TiO2 nanocuboids as an efficient photocatalyst for hydrogen generation

“…58,62 The nitrogen atoms in the C-N bonds might be from the precursor or from capping agent EDTA. Further, the small peak at 287.90 eV is attributed to C]O bond 63,64 Several studies have attributed the C dopants to carbonate species present on the TiO 2 surface in the form of Ti-O]C linkages. 65 However, the absence of a peak around 281-282 eV intrinsically resulting from a Ti-C bonding (O-Ti-C linkage) indicates that carbon does not substitute the oxygen atoms in the lattice of TiO 2 (substitutional C-doping).…”

The origin of chemical inhomogeneity in garnet electrolytes and its impact on the electrochemical performance

“…Alongside the removal of the carbonate species, the La 3d 5/2 core level also undergoes changes with the multiplet splitting increasing slightly from 4.4 eV to 4.6 eV, reaching a value more typical of La 2 O 3 (indicative of La in the LLZO lattice). 14,21,25 The lower initial value of 4.4 eV may correspond to the presence of some lanthanum oxycarbonate species, 25 which is removed by the etching process.…”