Results 31 to 40 of about 44,774 (227)

Combining EXAFS and Computer Simulations to Refine the Structural Description of Actinyls in Water

Molecules, 2020
EXAFS spectroscopy is one of the most used techniques to solve the structure of actinoid solutions. In this work a systematic analysis of the EXAFS spectra of four actinyl cations, [UO2]2+, [NpO2]2+, [NpO2]+ and [PuO2]2+ has been carried out by comparing
Sergio Pérez-Conesa, José M. Martínez, Rafael R. Pappalardo, Enrique Sánchez Marcos   +3 more
doaj   +1 more source

Quantitative analysis of EXAFS data sets using deep reinforcement learning

Scientific Reports
Extended X-ray absorption fine structure (EXAFS) serves as a unique tool for accurately characterizing the local structural properties surrounding specific atoms. However, the quantitative analysis of EXAFS data demands significant effort.
Eun-Suk Jeong, In-Hui Hwang, Sang-Wook Han   +2 more
doaj   +1 more source

Local atomic arrangement and martensitic transformation in Ni$_{50}$Mn$_{35}$In$_{15}$: An EXAFS Study

, 2007
Heusler alloys that undergo martensitic transformation in ferromagnetic state are of increasing scientific and technological interest. These alloys show large magnetic field induced strains upon martensitic phase change thus making it a potential ...
Bhobe P A, Brown P J, Entel P, K R Priolkar, P A Bhobe, P R Sarode, Söderberg O   +6 more
core   +1 more source

EXAFS Study on Local Structure of Iron Crystal by the Use of Asymmetrical Monochromator and PSPC [PDF]

, 1982
The EXAFS spectroscopy equipment constructed from an asymmetrical cut flat monochromator and PSPC is applied to the structural determination of pure α-iron which has small difference (0.038nm) in the first and second nearest neighbour distance.
Hida, M., Kamijo, N., Maeda, H., Tanabe, K., Terauchi, H.   +4 more
core   +1 more source

Biomass Native Structure Into Functional Carbon‐Based Catalysts for Fenton‐Like Reactions

Advanced Functional Materials, EarlyView.
This study indicates that eight biomasses with 2D flaky and 1D acicular structures influence surface O types, morphology, defects, N doping, sp2 C, and Co nanoparticles loading in three series of carbon, N‐doped carbon, and cobalt/graphitic carbon. This work identifies how these structural factors impact catalytic pathways, enhancing selective electron
Wenjie Tian, Jingkai Lin, Zhihao Tian, Selusiwe Ncube, Huayang Zhang, Emiliano Cortés, Hongqi Sun, Shaobin Wang   +7 more
wiley   +1 more source

Unveiling the local structure of the amorphous metal $$\text {Fe}_{(1-x)}\text {Zr}_x$$ Fe ( 1 - x ) Zr x combining first-principles-based simulations and modelling of EXAFS spectra

Scientific Reports, 2023
Amorphous alloys exhibit useful properties such as the excellent soft magnetic behaviour of Fe-based metallic glasses. The detailed structure of amorphous $$\text {Fe}_{(1-x)}\text {Zr}_x$$ Fe ( 1 - x ) Zr x with x = 0.07, 0.10, and 0.20 is in this work ...
Giuseppe Muscas, Robert Johansson, Sebastian George, Martina Ahlberg, Dimitri Arvanitis, Rajeev Ahuja, Ralph H. Scheicher, Petra E. Jönsson   +7 more
doaj   +1 more source

Electroactive Metal–Organic Frameworks for Electrocatalysis

Advanced Functional Materials, EarlyView.
Electrocatalysis is crucial in sustainable energy conversion as it enables efficient chemical transformations. The review discusses how metal–organic frameworks can revolutionize this field by offering tailorable structures and active site tunability, enabling efficient and selective electrocatalytic processes.
Irena Senkovska, Yutong Luo, Ruyan Zhao, Jianjun Zhang, Mingchao Wang, Xinliang Feng, Eike Brunner, Stefan Kaskel   +7 more
wiley   +1 more source

Open-source electrochemical cell for in situ X-ray absorption spectroscopy in transmission and fluorescence modes

Journal of Synchrotron Radiation
X-ray spectroscopy is a valuable technique for the study of many materials systems. Characterizing reactions in situ and operando can reveal complex reaction kinetics, which is crucial to understanding active site composition and reaction mechanisms.
Hiram Lopez-Astacio, Brenda Lee Vargas-Perez, Angelica Del Valle-Perez, Christopher J. Pollock, Lisandro Cunci   +4 more
doaj   +1 more source

Local structure of REFeAsO (RE=La, Pr, Nd, Sm) oxypnictides studied by Fe K-edge EXAFS

, 2009
Local structure of REOFeAs (RE=La, Pr, Nd, Sm) system has been studied as a function of chemical pressure varied due to different rare-earth size. Fe K-edge extended X-ray absorption fine structure (EXAFS) measurements in the fluorescence mode has ...
A. BIANCONI, A. IADECOLA, B. JOSEPH, D. MAHAJAN, L. SIMONELLI, M. FILIPPI, M. FRATINI, N.L. SAINI, S. AGRESTINI   +8 more
core   +1 more source

Tuning the Electronic Structure and Spin State of Fe─N─C Catalysts Using an Axial Oxygen Ligand and Fe Clusters for High‐Efficiency Rechargeable Zinc–Air Batteries

Advanced Functional Materials, EarlyView.
A FeN4─O/Clu@NC‐0.1Ac catalyst containing atomically‐dispersed FeN4─O sites (medium‐spin Fe2+) and Fe clusters delivered a half‐wave potential of 0.89 V for ORR and an overpotential of 330 mV at 10 mA cm−2 for OER in 0.1 m KOH. When the catalyst was used in a rechargeable Zn–air battery, a power density of 284.5 mW cm−2 was achieved with excellent ...
Yongfang Zhou, Yu Mao, Mengyao Chang, Ziyun Wang, Wenke Xie, Cuizhu Ye, Shanghai Wei, Lars Thomsen, Geoffrey I. N. Waterhouse   +8 more
wiley   +1 more source