On the X-ray photoelectron spectroscopy analysis of LiNixMnyCozO2 material and electrodes

Auger- and X-ray Photoelectron Spectroscopy at Metallic Li Material: Chemical Shifts Related to Sample Preparation, Gas Atmosphere, and Ion and Electron Beam Effects

“…This was recently demonstrated by Wood et al [27], with an impressive comparison of data from various publications. However, for a large variety of cathode materials, as well as for anode materials, the BE referencing and careful peak fitting plays an important role [31,40,41]. In a detailed review [42], possible uncertainties using the C1s BE reference of adventitious carbon have been discussed.…”

Single‐Step Solid‐State Scalable Transformation of Ni‐Based Substrates to High‐Oxidation State Nickel Sulfide Nanoplate Arrays as Exceptional Bifunctional Electrocatalyst for Overall Water Splitting

“…Each of Ni 2p 3/2 and Ni 2p 1/2 peaks is further split into two peaks (centered at 853.8 and 856.5 eV for Ni 2p 3/2 ; 871 and 874.5 eV for Ni 2p 1/2 ) due to non‐local screening of the core hole by charge transfer from the non‐nearest ligands. [ 37,38 ] Interestingly, a clear distinction between the sulfides formed above 400 °C can be observed in terms of area under the curve for different peaks as shown in Table S3, Supporting Information. Clearly, the sulfides formed above 400 °C show a much‐reduced area under the peak for the satellite peak in comparison to the NIS‐300 and NIS‐400 samples.…”

“…Recently, in an interesting study, Bondarchuk et al estimated the Ni 3+ : Ni 2+ component from the ratio of the main peak to the satellite peak (Ni 2p 3/2 : satellite1), based on the fact that the Ni 3+ , with d 7 electrons, has a low spin configuration which does not allow multiplet splitting, thus not contributing to satellite at all. [ 37 ] The overall contribution to the satellite peak is due to the Ni 2+ species in the system, and the ratio of Ni 2p 3/2 : satellite1 can be used for the relative estimation of Ni 3+ : Ni 2+ in a set of systems. For this purpose, Ni 2p 3/2 : satellite1 for all the Ni‐based sulfides were calculated by taking the area ratio of the deconvoluted peaks (Table S3, Supporting Information).…”

A novel CoNi7O8/MnO2 nanocomposite supported on Ni foam as a peroxymonosulfate activator for the highly efficient singlet oxygen mediated removal of methylene blue

“…The weak peaks at 854.0 and 872.1 eV were ascribed to the presence of Ni 2+ while the strong peaks at 855.6 and 873.7 eV indicated the appearance of Ni 3+ . 25,26 The relative content of Ni 2+ in the total Ni on the catalyst surface was 8.9%. The O 1s XPS spectrum in Fig.…”