Results 51 to 60 of about 45,221 (235)

An experimental and theoretical study of Ni impurity centers in Ba$_{0.8}$Sr$_{0.2}$TiO$_3$

, 2017
The local environment and the charge state of a nickel impurity in cubic Ba$_{0.8}$Sr$_{0.2}$TiO$_3$ are studied by XAFS spectroscopy. According to the XANES data, the mean Ni charge state is $\sim$2.5+.
Lebedev, A. I., Sluchinskaya, I. A.
core   +1 more source

Rate‐Adaptive Site Transformation Catalyst for Parallel Water Dissociation and Hydrogen Adsorption in Alkaline Hydrogen Evolution

Advanced Functional Materials, EarlyView.
This work presents a rate‐adaptive site transformation strategy in Ag‑ethylenediamine intercalated Co9S8, which not only enables parallel water dissociation and H* adsorption, but also allows the catalyst to provide more active sites under high demand, removing a major bottleneck. The catalyst achieves a record current density of 4.2 A cm−2@2.0 V, with
Yongqi Ye, Yuzhuo Jiang, Bin Tian, Derek Ho   +3 more
wiley   +1 more source

X-ray absorption spectroscopy of lanmodulin-derived peptides bound to rare earth elements

Journal of Synchrotron Radiation
A sustainable and robust supply chain of rare earth elements (REEs) is necessary to meet our consumer, national security and clean energy goals. However, current intra-REE separation technologies (e.g.
Adam Smerigan, Adam S. Hoffman, Jorge Perez-Aguilar, Rui Shi, Simon R. Bare   +4 more
doaj   +1 more source

Phaseseparation in overdoped Y_{1-0.8}Ca_{0-0.2}Ba_2Cu_3O_{6.96-6.98}

, 1999
The dimpling in the CuO_2 planes of overdoped Y_{1-y}Ca_yBa_2Cu_3 O_{6.96-6.98} (y=0.02-0.2) has been measured by x-ray absorption-fine- structure spectroscopy (Y-K EXAFS).
Böttger, G., Friedrich, C., Granzow, T., Kaldis, E., Röhler, J.   +4 more
core   +1 more source

Balancing Electrons to Break the Activity‐Selectivity Trade‐Off in H2O2 Electrosynthesis

Advanced Functional Materials, EarlyView.
Carrier‐concentration balancing in CuS is achieved by coupling cobalt dopants with cobalt vacancies, converting CuS from p‐ to n‐type to accelerate 2e− ORR while withdrawing excess carriers to optimize *OOH binding for H2O2 desorption. The catalyst reaches 8.14 mol g−1 h−1 with >84% selectivity in 1.0 M KOH and drives robust electro‐Fenton dye ...
Hangning Liu, Changhui Sun, Luyao Wang, Yuhang Cheng, Yi Xin, Xuyun Guo, Hui Li, Valeria Nicolosi, Yuhai Dou, Peng Li, Tianyi Ma, Jie Wang   +11 more
wiley   +1 more source

Local motifs in GeS$_2$-Ga$_2$S$_3$ glasses [PDF]

, 2016
The structure of (GeS$_2$)$_{0.75}$(Ga$_2$S$_3$)$_{0.25}$ and (GeS$_2$)$_{0.83}$(Ga$_2$S$_3$)$_{0.17}$ glasses was investigated by Raman scattering, high energy X-ray diffraction and extended X-ray absorption fine structure (EXAFS) measurements at the Ga
Belin, Stéphanie, Bureau, Bruno, Chahal, Radwan, Jóvári, Pál, Kaban, Ivan, Nazabal, Virginie, Pethes, Ildikó   +6 more
core   +4 more sources

HIGH RESOLUTION EXAFS-XANES SPECTROMETER

Le Journal de Physique Colloques, 1986
No abstract ...
BALERNA A, BUSCHERT R, GIARDINA MD, INZAGHI D, MOBILIO, Settimio   +4 more
openaire   +4 more sources

Carbon Shell‐Encapsulated PtFe Catalysts in High Temperature Polymer Electrolyte Membrane Fuel Cells: Balancing Molecular Sieving and Diffusion for Enhanced Reactant Access

Advanced Functional Materials, EarlyView.
Scanning electrochemical microscopy reveals reactant diffusion through porous carbon shells to PtFe cores, while the carbon‐encapsulated PtFe enables high‐performance HT‐PEMFC operation by sieving phosphate ions that induce catalyst poisoning. ABSTRACT High‐temperature polymer electrolyte membrane fuel cells (HT‐PEMFCs) operating at 160°C on phosphoric
Myeong‐Geun Kim, Sourabh S. Chougule, Suji Lee, Young Sang Park, Jihyun Choi, Katie Heeyum Lim, Albert S. Lee, Hyun S. Park, Namgee Jung, Sung Jong Yoo   +9 more
wiley   +1 more source

Oxidation Behavior of Platinum Group Alloys in Molten Glass

Electrochemistry
The composition of platinum group alloys in insoluble residue liquid waste produced during spent nuclear fuel reprocessing depends on the type of fuel and the degree of burn-up.
Koya YAMAZAKI, Naoki TARUMI, Isamu SATO, Haruka TADA, Haruaki MATSUURA   +4 more
doaj   +1 more source

Mechanisms of Copper and Mercury Adsorption on Bentonite Clays from EXAFS Spectroscopy

Chemical Engineering Transactions, 2014
Copper(II) and Mercury(II) cations are classified as important heavy metal pollutants in industrial wastewaters. In this study, Extended X-Ray Absorption Fine Structure (EXAFS) spectroscopy was used to provide information about the coordination ...
M.G.A. Vieira, A.F. de Almeida Neto, M.G.C. da Silva   +2 more
doaj   +1 more source