Figure 7 B shows the high-resolution XPS spectra of O 1 s and V 2p, indicating the presence of an oxide layer on the surface of VN. The peaks at 532.2 and 529.9 eV of O1s can be attributed to...

The XPS survey spectrum of VNO/graphene reveals that the C1s signal is the most prominent. This is attributed to the presence of graphene as the substrate. This finding offers new insights into the synergistic effects of material composition and doping strategies.

XPS core-level spectra in the V2p, N1s and O1s regions, for the VN thin films deposited under 10 and 20 sccm of nitrogen, are shown in Fig. 1. XPS spectra indicated that there are not only V-V...

Feb 1, 2018 · According to the XPS results, vanadium on the surface of VN microspheres existed mainly in the form of VN, with a small amount of VNO and mixed-valence vanadium oxide. BET analysis indicates that the VN microspheres had a high specific surface area of 33 m 2 /g.

Jun 1, 2022 · Herein, the functions and mechanism of TMNs with different metal oxynitride (TMNO x) concentrations in pseudocapacitive electrodes are investigated systematically by in situ Raman scattering, ex situ X-ray photoelectron spectroscopy, as well as ion isolation and substitution cyclic voltammetry.

Jul 11, 2024 · The elemental compositions of V, N, and O of the as-prepared electrocatalysts were analyzed by X-ray photoelectron spectroscopy (XPS) (Figure 4a). The high-resolution V 2p 3/2 XPS spectra of the samples in Figure 4b were deconvoluted based on …

The present work focuses on the synthesis of a vanadium nitride (VN)/carbon nanocomposite material via the thermal decomposition of vanadyl phthalocyanine (VOPC).

Jun 25, 2024 · The XPS results confirmed the presence of V (III)-N bonds in the resultant material, indicating the formation of a VN/C nanocomposite. The VN/C nanocomposite synthesized through thermal decomposition exhibited a high carbon content and a cluster-like distribution of VN particles.

Since single-phase V2O3 and VN exhibit different surface catalytic kinetics for NRR, the V2O3/VN hybrid elec-trocatalyst can provide alternating reaction pathways, selecting a lower energy pathway for each material in the serial NRR pathway.

Mar 16, 2020 · The importance of proper curve fitting of XPS spectra based on appropriate peak widths and shapes for correct data interpretation is highlighted. Appropriate peak fitting and chemical identification are critical to developing structure-to-property correlations for functional materials in which nitrogen chemistry plays a vital role.