Results 21 to 30 of about 484 (218)

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

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

30 years of Journal of Synchrotron Radiation and synchrotron science

Journal of Synchrotron Radiation
Journal of Synchrotron Radiation (JSR) came into being with the publication of its inaugural issue in October 1994 that contained 15 full articles comprising 100 pages. Thirty years of JSR has coincided with several Nobel Prizes that have arisen from the
S. Samar Hasnain
doaj   +1 more source

Theoretical investigation of thermal disorder in CuCo alloys

Results in Physics, 2020
In this work, we investigate thermal disorder in intermetallic CuCo alloys by extending the anharmonic correlated Einstein model in extended X-ray absorption fine structure (EXAFS) theory.
Pham Thi Minh Hanh, Nguyen Ba Duc, Nguyen Van Nghia, Nguyen Viet Tuyen, Ho Khac Hieu   +4 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

Polarizable Vanadium Dipoles Promote Water Dissociation on Vanadium‐Based Metal Organic Framework

Advanced Functional Materials, EarlyView.
The polarization of unpaired V 3d electrons weakens the H─O bond to improve water dissociation by the dual Vδ+:O─H and Pλ−:H─O coupling hydrogen bonds formation and relaxation. P@V‐MOF electrocatalyst shows low overpotentials (94 mV in acid, 178 mV in neutral, and 77 mV in alkaline solutions) with excellent stability for effective overall water ...
Xinjuan Liu, Jun Xu, Minmin Fan, Jingcheng Xu, Mengyuan Li, Yun Gong, Weiwei Yang, Lei Li, Yong Zhou, Deqiang Zhao, Yuhua Xue, Xingtao Xu, Chang Q. Sun, Liming Dai   +13 more
wiley   +1 more source

Tuning Redox Dynamics in Cu‐Based Electrocatalysts: Effect of Secondary Metals

Advanced Functional Materials, EarlyView.
Advanced analysis of operando X‐ray absorption spectroscopy data reveals that secondary metals affect the redox processes in Cu‐based catalysts for electrocatalytic CO2 reduction. This influences the amount of oxides formed under pulsed reaction conditions and the distribution of reaction products.
Martina Rüscher, Andrea Martini, Eduardo Ortega, Lichen Bai, Eric Liberra, Daniel Escalera‐López, Hyo Sang Jeon, Antonia Herzog, Clara Rettenmaier, Dorottya Hursán, David Koshy, Mariana Cecilio de Oliveira Monteiro, Timon Wagner, Leon Jacobse, Felix Haase, Arno Bergmann, Janis Timoshenko, Beatriz Roldan Cuenya   +17 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

Functionalizing Micro‐to‐Mesoscopic Electrode Architectures for Regulating Electron Transfer Behaviors in Electrocatalysis

Advanced Functional Materials, EarlyView.
A systematic review is conducted to assess the influence of electrode architecture across micro‐ to mesoscopic length scales on electron‐transfer pathways in electrocatalysis. We discuss the structure‐activity relationships in electrocatalytic applications, including resource recovery and environmental remediation, and provide cost‐effective, efficient
Manshu Zhao, Jiaojiao Zhang, Shideng Yuan, Xinmeng Yu, Keming Wan, Xiaoguang Duan, Zhining Wang   +6 more
wiley   +1 more source

Nanoparticle size evaluation of catalysts by EXAFS: Advantages and limitations

Zaštita Materijala, 2016
In this article we determine particle size of nanocatalysts using the first-shell fitting results of Extended X-ray Absorption Fine Structure (EXAFS) measurements.
Nebojša S. Marinković, Radoslav R. Adžić   +1 more
doaj   +1 more source