2023年11月6日 · Benefiting from the high-concentration single-atom sites exposed by this structure, the developed high-loading Ni single-atom photocatalyst (Ni SAPs -PuCN) exhibits high activity and...

2021年11月10日 · By using operando x-ray absorption fine structure (XAFS) spectroscopy, successive structural transformations of Br-Ni-MOF hollow prism electrocatalysts into the β-Ni (OH) 2 and γ-NiOOH analogs during the OER process are promptly observed.

2023年1月18日 · Herein we present a comparative XAFS study where the in situ sulfidation of Mo/δ-Al 2 O 3 and Ni/δ-Al 2 O 3 is compared to that of δ-Al 2 O 3 supported NiMo catalysts with different NiMo ratios.

2019年12月12日 · Based on X-ray photoelectron spectroscopy (XPS) and X-ray absorption fine structure (XAFS) spectroscopy measurements, nitrogen species in N-doped carbon have been demonstrated to be coordinated with surface nickel species to form Ni–N motifs, which makes Ni at a low-valent state for efficient CO 2 RR.

A series of nickel dithiolene complexes Ni[S2C2(CF3)2]2n (n = −2, −1, 0) has been investigated using Ni L- and K-edge X-ray absorption spectroscopy (XAS). The L3 centroid shifts about 0.3 eV for a change of one unit in the formal oxidation state (or 0.3 eV per oxi), corresponding to …

2021年11月30日 · Here we report that the dispersion of metallic Ni particles into under-coordinated two-dimensional Ni clusters over γ-Mo2N is a thermodynamically favorable process based on the AIMD simulation.

2006年4月10日 · We apply the Ni $K$-edge x-ray absorption fine structure analyses to the local electronic and geometric structures around embedded Ni impurities used as catalysts in a carbon nanofiber in combination with multiple scattering analyses.

1995年3月1日 · We report on the valency and local structure of nickel in α-Ni (OH) 2, β-Ni (OH) 2, Ni 2 O 3 ·6H 2 O, Ni 3 O 2 (OH) 4, β-NiOOH, γ-NiOOH, NiO 2 and NiKIO 6.

Residual Ni species after Ni removal treatment of carbon nanofibers have been investigated by use of XAFS analyses. Most of the Ni impurities are in Ni monomer which is located on defects in carbon nanofibers.

2021年9月28日 · NiB alloys with different boron concentrations were studied by the synchrotron radiation-based x-ray absorption fine structure (XAFS) spectroscopy technique.