Jul 5, 2019 · Here we demonstrate that the electrocatalytic activity of manganese-based heterogeneous catalyst can be significantly improved through halogen and nitrogen dual-coordination to modulate the...

Aug 28, 2020 · In situ X-ray absorption spectra and density functional theory calculations demonstrate that the remarkable performance of the catalyst is attributed to the Mn-N 3 site, which facilitates the...

May 16, 2021 · In situ X-ray absorption near-edge structure (XANES) studies enable identification of the oxidation states of the metal atoms, while the extended X-ray absorption fine structure (EXAFS) data enable the study of the accompanying change in oxygen coordination.

Jan 17, 2024 · Here we report that optimizing the lattice oxygen structure of manganese oxide allows it to sustain the oxygen evolution reaction for over one month at 1,000 mA cm −2 in 1 M H 2 SO 4.

Dec 31, 2020 · Evidenced from the ex situ aberration-corrected (AC) high-angle annular dark-field scanning transmission electron microscopy (HAADF-STEM) and X-ray absorption fine structure (XAFS), Mn was atomically dispersed on the nitrogen …

Jul 22, 2008 · In this study, we present the results of a high-resolution XANES spectroscopy study obtained for 40 Mn-bearing model compounds, including numerous natural and some synthetic oxides and silicates containing manganese in different valences (II–VII) and with various symmetries (octahedral, square planar, cubic, or tetrahedral).

Sep 1, 2021 · XAFS spectroscopy were employed to probe the local structure around Mn atoms in the Mn doped lead halide perovskite NCs. Mn K-edge for the samples were measured at P64 beamline at Petra III, DESY Hamburg.

Mar 1, 2010 · X-ray absorption fine structure (XAFS) measurements were carried out to probe the local environment surrounding the Mn ions in the NPs and the NRs. The results showed that Mn ions were incorporated into the ZnS lattice substituting the Zn sites.

Evidenced from the ex situ aberration-corrected (AC) high-angle annular dark-field scanning transmission electron microscopy (HAADF-STEM) and X-ray absorption fine structure (XAFS), Mn was atomically dispersed on the nitrogen-doped carbon (CN) in the form of Mn N4 structure.

The calcination process of the silica-supported Mn catalysts was investigated by means of in-situ XAFS technique using various Mn precursors. The hydrated Mn salts were first formed on silica after drying at 60 °C for all Mn precursors, and were oxidized to various Mn oxides except for MnSO 4 as the precursor.