Results 31 to 40 of about 3,066 (157)

Dispersion and stability mechanism of Pt nanoparticles on transition-metal oxides

Scientific Reports, 2022
The heterogeneous catalysts of Pt/transition-metal oxides are typically synthesized through calcination at 500 °C, and Pt nanoparticles are uniformly and highly dispersed when hydrogen peroxide (H2O2) is applied before calcination.
Eun-Suk Jeong, In-Hui Hwang, Sang-Wook Han   +2 more
doaj   +1 more source

X-ray absorption fine structure (XAFS)-based radionuclide research at the KIT Light Source

Safety of Nuclear Waste Disposal, 2023
Abstract. In the past two decades, X-ray absorption spectroscopy (XAS) and related synchrotron-based radionuclide speciation techniques have become indispensable, supporting open issues in fundamental radiochemistry and nuclear waste disposal alike. Physicochemical structure information – encoded in the element-specific X-ray absorption fine structure (
openaire   +4 more sources

X-ray absorption fine structure (XAFS) spectroscopy using synchrotron radiation

Journal of Physics: Conference Series, 2012
The X-ray absorption fine structure (XAFS) spectra are best recorded when a highly intense beam of X-rays from a synchrotron is used along with a good resolution double crystal or curved crystal spectrometer and detectors like ionization chambers, scintillation counters, solid state detectors etc.
openaire   +1 more source

Studies on Surface and Interface with X-ray Absorption Fine Structure (XAFS). Time Resolved XAFS Studies for Catalysts Preparation.

Hyomen Kagaku, 2002
Time resolved dispersive XAFS (DXAFS) is a useful method to elucidate changing structures and is applicable to investigate the structures of short living species during chemical reactions. We applied this method to the chemical study of catalysts preparation.
SHIDO, Takafumi, YAMAGUCHI, Aritomo, SUZUKI, Akane, INADA, Yasuhiro, ASAKURA, Kiyotaka, NOMURA, Masaharu, IWASAWA, Yasuhiro   +6 more
openaire   +2 more sources

Theoretical Calculation of Finite‐Temperature X‐Ray Absorption Fine Structure: Application to Sodium K‐Edge in NaCl

ChemElectroChem
This study presents a comprehensive computational framework for reproducing the full X‐ray absorption fine structure (XAFS) through quantum‐chemical simulations.
Philipp Hönicke, Yves Kayser, Pouya Partovi‐Azar   +2 more
doaj   +1 more source

Operando XAFS and XRD Study of a Prussian Blue Analogue Cathode Material: Iron Hexacyanocobaltate

Condensed Matter, 2018
The reversible electrochemical lithiation of potassium iron hexacyanocobaltate (FeCo) was studied by operando X-ray diffraction (XRD) and X-ray absorption fine structure (XAFS) assisted by chemometric techniques.
Angelo Mullaliu, Paolo Conti, Giuliana Aquilanti, Jasper Rikkert Plaisier, Lorenzo Stievano, Marco Giorgetti   +5 more
doaj   +1 more source

Synchrotron XANES and EXAFS evidences for Cr+6 and V+5 reduction within the oil shale ashes through mixing with natural additives and hydration process

Heliyon, 2021
Solid friable residues (i.e. Ash) from combusted oil shale are a major environmental issue because they are highly enriched with toxic elements following combustion.
Tayel El-Hasan, Messaoud Harfouche, Allayth Aldrabee, Nafeth Abdelhadi, Nizar Abu-Jaber, Giuliana Aquilanti   +5 more
doaj   +1 more source

A new QEXAFS system on the general XAFS beamline at the Shanghai Synchrotron Radiation Facility

Journal of Synchrotron Radiation, 2022
A new quick-scanning extended X-ray absorption fine-structure (QEXAFS) system for in situ studies has been developed and tested on the general XAFS beamline at the Shanghai Synchrotron Radiation Facility. In the new system, an analog-to-digital converter
Yongnian Zhou, Songqi Gu, Ying Zhao, Zheng Jiang, Zhaohong Zhang   +4 more
doaj   +1 more source

Deciphering the Local Environment of Electrocatalytic Metal Sites with X‐ray Absorption Fine Structure

Small Structures
Electrocatalysis plays a pivotal role in energy conversion and holds significant promise for the development of new energy sources. Understanding the intricate atomic‐level interplay between active sites and electrocatalytic activity is essential for ...
Nan Zhang, Jianqiang Wang
doaj   +1 more source

A METHOD FOR CALCULATION OF MORSE POTENTIAL FOR FCC, BCC, HCP CRYSTALS APPLIED TO DEBYE-WALLER FACTOR AND EQUATION OF STATE

Communications in Physics
Analytical expressions for the Morse potential parameters for fcc, bcc and hcp crystals have been developed. They contain the energy of sublimation, the compressibility and the lattice constant.
NGUYEN VAN HUNG
doaj   +1 more source