2011年7月1日 · In this work we present the results of the Ni K-edge EXAFS interpretation in crystalline and nanocrystalline NiO, obtained by joined use of classical molecular dynamics (MD) and ab initio multiple-scattering EXAFS theory [31].

2024年2月29日 · The extended X-ray absorption fine structure (EXAFS) in R space (Fig. 5b and Supplementary Fig. 24) revealed that the Ni–O 1 and Ni–TM bond lengths were...

2021年12月1日 · In this research, we employed a combination of macroscopic batch sorption studies, transmission electron microscopy (TEM), diffuse reflectance spectroscopy (DRS), and extended X-ray absorption fine structure (EXAFS) spectroscopy to elucidate the sorption mechanisms of nickel (Ni) at palygorskite/solution interfaces.

2020年8月17日 · Using in situ X-ray absorption spectroscopy (XAS), we show that the dominant active site for HER is the Ni single atom in its intrinsic environment in an acidic electrolyte, while, in...

2021年9月22日 · The Fourier-transform extended X-ray absorption fine structure (FT-EXAFS) spectra of Ni-CNG, Co-CNG, and Fe-CNG are very similar with respect to the main peaks located...

4 天之前 · 图 4: Co 掺杂和 Cr 空位对 Ni-Fe 双位点电子结构的优化：a) 高分辨 Ni 2p X 射线光电子能谱（XPS）谱图；b) Ni L 边的软 X 射线吸收光谱（sXAS）；c) VCr,Co-NiFeOOH 和 VCr-NiFeOOH 的 Ni K 边 EXAFS 谱，以 NiO 和 Ni 箔为参考；d) VCr,Co-NiFeOOH 和 Co-NiFeOOH 的 Fe K 边 EXAFS 谱，以 Fe₂O₃ ...

2021年11月25日 · 扩展边X射线精细结构 (EXAFS) 谱以及小波变换证明了Fe、Ni在 Fe 1-Ni 1-N-C中均以单原子形式存在 (图4b, 4c和4e)。 EXAFS拟合确定了Fe- N 4 和Ni- N 4 的配位构型 (图4d, 4f)。

2010年12月1日 · The structure relaxation in nanocrystalline NiO (nano-NiO, 13 nm crystallite size) has been studied by X-ray absorption spectroscopy at the Ni K-edge at 300 K. Conventional single-scattering analysis of the EXAFS signals from the first two coordination shells showed a lattice volume expansion by about 1% and a contraction of the Ni–O bonds by ...

2023年11月6日 · The best-fit analysis results of EXAFS (Fig. 3d and Supplementary Table 3) show that each Ni atom in Ni SAPs-PuCN is bonded with three N atoms as Ni-N 3 coordination, and the average Ni-N...

2023年1月18日 · Herein we present a comparative XAFS study where the in situ sulfidation of Mo/δ-Al2O3 and Ni/δ-Al2O3 is compared to that of δ-Al2O3 supported NiMo catalysts with different NiMo ratios. The study also covers the comparison of sulfidation of Ni and Mo using different oxide supports as well as the sulfidation conditions applied in the reactor.