Results 101 to 110 of about 28,295 (284)

LaSrVMoO$_6$: A case study for $A$-site covalency-driven local cationic order in double perovskites

open access: yes, 2012
An unusual atomic scale chemical fluctuation in LaSrVMoO$_6$, in terms of narrow patches of La,V and Sr,Mo-rich phases, has been probed in detail to understand the origin of such a chemical state. Exhaustive tuning of the equilibrium synthesis parameters
Abhishek Nag   +7 more
core   +1 more source

XAFS in the high-energy region

open access: yesJournal of Synchrotron Radiation, 1998
XAFS (X-ray absorption fine-structure) spectra were measured near K-absorption edges of Ce (40.5 keV), Dy (53.8 keV), Ta (67.4 keV) and Pt (78.4 keV). The blunt K-edge jump due to the finite lifetime of the core hole was observed. This makes it difficult to extract EXAFS (extended X-ray absorption fine-structure) functions at low k values.
Y, Nishihata   +4 more
openaire   +2 more sources

Vacancy‐Suppressed Garnet Electrolytes for Durable Solid‐State Batteries

open access: yesAdvanced Science, EarlyView.
A Li/O‐rich sintering strategy effectively suppresses intrinsic lithium and oxygen vacancies in cubic garnet electrolytes, yielding a dense and stable microstructure. The vacancy‐controlled electrolyte exhibits enhanced interfacial and air stability, enabling long‐term solid‐state battery cycling and providing a general design principle for defect ...
Seokjae Hong   +20 more
wiley   +1 more source

Advanced X-ray absorption spectroscopy for probing dynamics in CO2 reduction reaction electrocatalysts

open access: yesCommunications Materials
Electrochemical CO2 conversion to value-added fuels presents an appealing avenue to realize low-carbon footprint. However, achieving sustainable energy conversion hinges on a comprehensive analysis of the catalyst surface-interface. X-ray Absorption Fine
Beibei Sheng   +5 more
doaj   +1 more source

Condensation of a tetrahedra rigid-body libration mode in HoBaCo4O7 : the origin of phase transition at 355 K

open access: yes, 2009
Rietveld profiles, Moessbauer spectra and x-ray absorption fine structure (XAFS) were analyzed through the structural phase transition at Ts = 355 K in HoBaCo4O7. Excess of the oxygen content over O7 was avoided via annealing the samples in argon flow at
A I Rykov   +15 more
core   +1 more source

Tuning Defects in Ni‐Doped Maghemite for Enhanced Solar Driven Oxygen Evolution: Insights From Operando X‐Ray Spectroscopies

open access: yesAdvanced Science, EarlyView.
ABSTRACT Maghemite (γ$\gamma$‐Fe2${\rm Fe}_2$O3${\rm O}_{3}$) is a promising non‐precious‐metal‐containing photocatalyst for water oxidation (OER). Despite being less studied than Hematite, it offers similar corrosion resistance and a favorable band structure, along with higher conductivity and the advantage of an adaptable spinel structure.
Francesco Paparoni   +6 more
wiley   +1 more source

On the Structure and Redox Behavior of Ni and Cu Single Atoms Supported on Carbon Nitride

open access: yesAngewandte Chemie, EarlyView.
Magnetic and electronic spectroscopies, combined with DFT, establish the MN4 binding site of Ni and Cu single atoms on carbon nitride and elucidate their redox photochemistry. Ni undergoes geometry‐preserving, reversible M2+/M+ cycling, whereas Cu collapses to an irreversible low‐coordinate Cu+ state, suppressing photocatalysis.
Giovanni Colonnello   +13 more
wiley   +2 more sources

Debye-Waller factor of Pt in X-ray absorption fine structure analyzed using classical anharmonic correlated Einstein model

open access: yesCommunications in Physics
An analysis of the Debye-Waller (DW) factor in the anharmonic X-ray absorption fine structure (XAFS) of crystalline platinum (Pt) has been conducted under the influence of thermal disorder.
Nguyen Huy Thao   +3 more
doaj   +1 more source

Copper accumulation in the sequestrum of medication-related osteonecrosis of the jaw

open access: yesBone Reports, 2015
Bisphosphonates (BPs) have been widely, efficiently, and safely used for the treatment of various bone-related diseases such as osteoporosis. However, concerns about jaw osteonecrosis associated with oral treatment (medication-related osteonecrosis of ...
Tomoko Sugiyama   +6 more
doaj   +1 more source

The distribution of oxygen at the Ni81Fe19/Ta interface

open access: yes, 2019
The knowledge of how oxygen atoms are distributed at a magnetic-metal / oxide, or magnetic-metal / non-magnetic-metal interface, can be an useful tool to optimize device production.
Carara, M.   +5 more
core   +1 more source

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