2021年10月30日 · X-ray powder diffraction (XRD) analysis was used to study the crystal structure of as-prepared samples. As shown in Fig. 2 (a), the diffraction peaks at 44.5°, 51.8°, and 76.4° correspond to the crystal plane of the Ni mesh. The small peaks marked with symbols correspond to the (0 0 6), (1010), (0014), and (0015) crystal planes of the ...

2022年2月20日 · A Bruker X-ray diffraction (XRD) machine with Cu kα irradiation (λ=1.5406 Å), operated at step size and scan rate of 0.05° and 0.025° s-1, respectively, was used to determine the XRD spectra of the samples. The SEM morphological imaging was carried out using Auriga 60 Crossbeam at an accelerating voltage of 3 kV.

The activation energy at zero-overpotential and the overpotential at zero-activation-energy on β-NiFeOOH/NF are the lowest (89 kJ mol −1 and 350 mV), revealing the key origin of its high activity. This work provides the first experimental evidence for the high OER activity of Fe-doped NiOOH catalysts from the aspect of electrochemical ...

2014年4月16日 · We report electrochemical, in situ electrical, photoelectron spectroscopy, and X-ray diffraction measurements on Ni 1–x Fe x (OH) 2 /Ni 1–x Fe x OOH thin films to investigate the changes in electronic properties, OER activity, and structure as a result of Fe inclusion.

XRD patterns of NiFe and Ni indicate that the doping of small amount of Fe into Ni nanosheets does not change their crystal structure. The typical SEM images of (b) NiFe/NF and (c) Ni/NF,

2024年3月31日 · The structural information of NiFeOOH-NiFe-LDH were studied by an X-ray diffraction (XRD, Bruker D8, Bruker Corporation, Karlsruhe, Germany). Microstructure and elemental distribution are characterized by scanning electron microstructure (SEM with EDS, Apreo S LoVac, Thermo Fisher Scientific, Hillsboro, Oregon, United States) and transmission ...

2024年8月15日 · The XRD patterns of NiFeOOH and Ce@NiFeOOH (Fig. S8 a) show that the presence of several broad diffraction peaks, suggesting the transformation of NiFe-MIL-53 into low crystallinity species.

2025年2月21日 · In-depth mechanism investigations reveal that Ru single atoms not only act as the highly active sites, but also facilitate the conductivity of NiFe LDH. Meanwhile, S anions accelerate the electrochemical reconstruction of NiFe LDH to OER-active NiFeOOH and alleviate the over-oxidation issue on Ru active sites.

2021年12月13日 · The design of high-performance and durable electrodes for the oxygen evolution reaction (OER) is crucial for anion-exchange membrane water electrolyzers (AEMWE). Herein, a three-dimensional unified electrode in which nickel–iron oxyhydroxide (NiFeOOH) is directly electrodeposited on a gas diffusion layer (GDL) is developed as an AEMWE anode.

2022年9月4日 · Herein, we present partially oxidized bismuthene as a functional interlayer between BiVO 4 and an archetypal electrocatalyst, NiFeOOH. The BiVO 4 /Bi/NiFeOOH composite photoanode generates a high photocurrent of 3.4 (±0.2) mA cm -2 at a low bias of +0.8 VRHE, approximately six times higher than bare BiVO 4 photoanodes.