2025年2月21日 · NiFe-layered double hydroxides (LDHs) are promising electrocatalysts for the oxygen evolution reaction (OER) in alkaline media. Here, operando X-ray diffraction (XRD) and X-ray total scattering are used with Pair Distribution Function (PDF) analysis to investigate the atomic structure of the catalytically active material and …

2024年1月15日 · The of NiFe LDH crystal strucurres were analyzed using X-ray diffraction (XRD, Bruker AXS, D2 Phaser) with a Cu K α radiation source (λ = 1.5418 Å) and Ni fillter. The functional groups of the NiFe LDH structures were chraterized using Fourier-transform infrared spectroscopy (FT-IR; Bruker, VERTEX 70).

2024年1月25日 · The Raman analysis proves the transition from NiFe-LDH, with some Fe oxide impurities, to full Ni(Fe)OOH. These results, achieved via Raman spectroscopy, correlate well with those obtained by means of XRD. The X-ray photoelectron spectroscopy (XPS) high-resolution spectra of Ni 2p, Fe 2p and O.1s are shown in Figure S13 (Supporting Information).

2024年10月18日 · In addition, NiFe LDH/NF shows XRD peaks matching those of Ni 5·64 Fe 2·36 (OH) 16 (CO 3) 1.18 ·7.52H 2 O (PDF # 51–0463), demonstrating the successful synthesis of NiFe LDH. The Fe LDH/NF also showed weak Ni 5·64 Fe 2·36 (OH) 16 (CO 3 ) 1.18 ·7.52H 2 O (PDF # 51–0463) diffraction peaks, indicating that the Ni in the NF substrate ...

3 天之前 · NiFe-layered double hydroxides (LDHs), one of the several NiFe-based composites, are recognized as cost-effective transition metal–based materials with excellent electrochemical performance under alkaline OER conditions. ... The XRD of Ni 3 Fe with and without the addition of NH 4 F during the synthesis (Figure S1a) exhibited negligible ...

2020年8月1日 · The crystallinity and crystal structure of the NiFe alloy nanoparticles were investigated using X-ray diffraction (XRD; RIGAKU, D/MAX 2200 V/PC) with a Cu Kα radiation source (λ =0.154 nm). The surface morphology of the samples was characterized using scanning electron microscopy (SEM; Hitachi, S-4300SE) and high-resolution transmission ...

2024年8月13日 · The in situ XRD results indicated that the crystallinity of CAPist-L1 was well preserved during electrocatalysis at 1.20–1.60 V, different from that of NiFe-LDH (Supplementary Fig. 33).

2024年11月18日 · Figure 1a shows the XRD patterns of FTO, TiO 2 film, and NiFe-LDH film. It can be seen that the XRD pattern of pure TiO 2 on FTO substrate matches very well with the XRD pattern of rutile phase. Four sharp reflections located at 36.1°, 54.3°, 62.7° and 69.0° correspond to the (101), (211), (002) and (301) diffraction peaks of rutile TiO 2 ...

5 天之前 · The XRD results show the basal spacing in NiFe LDH nanosheets directly responds to the size of halide anions. In addition, XRD patterns indicate the successful growth of the MMT@NiFe LDH . The peaks from XRD match both the montmorillonite (MMT) structure and the hydrotalcite-type NiFe LDH. The diffractogram shows (003) growing wider between 7. ...

4 天之前 · The successful formation of NiFe LDH, CS/KCa/PVA and CS/KCa/PVA-NiFe LDH was confirmed by FTIR, XRD, SEM and TEM analysis. The optimum weight% of these nanoparticles in the hydrogel matrix was obtained 2 wt% and the removal efficiency of CS/KCa/PVA was enhanced from 68.86 to 91.94% by incorporating 2wt.% of NiFe LDH. The swelling study ...