Results 101 to 110 of about 40,331 (294)

Nanocrystal Quality–Controlled Scintillation in Porous YAG:Ce Aerogels

Advanced Optical Materials, EarlyView.
High‐temperature thermal treatment of YAG:Ce nanoscintillator aerogels increases light yield under ionizing radiation by up to eightfold without affecting timing performance. Additionally, low‐temperature atmospheric treatments reversibly modify the cerium oxidation state, revealing strong defect sensitivity and offering new strategies to optimize ...
Pavlo Mai, Yannis Cheref, Raphael Marie‐Luce, Frédéric Lerouge, Julien Houel, Gilles Ledoux, Alice Perret, Francesca Cova, Mauro Fasoli, Benoit Sabot, Frédéric Chaput, Christophe Dujardin   +11 more
wiley   +1 more source

Diurnal Variation and Spatial Distribution Effects on Sulfur Speciation in Aerosol Samples as Assessed by X-Ray Absorption Near-Edge Structure (XANES)

Journal of Analytical Methods in Chemistry, 2012
This paper focuses on providing new results relating to the impacts of Diurnal variation, Vertical distribution, and Emission source on sulfur K-edge XANES spectrum of aerosol samples.
Siwatt Pongpiachan, Kanjana Thumanu, Warangkana Na Pattalung, Phoosak Hirunyatrakul, Itthipon Kittikoon, Kin Fai Ho, Junji Cao   +6 more
doaj   +1 more source

Comparison of the Oxidation State of Fe in Comet 81P/Wild 2 and Chondritic-Porous Interplanetary Dust Particles

, 2010
The fragile structure of chondritic-porous interplanetary dust particles (CP- IDPs) and their minimal parent-body alteration have led researchers to believe these particles originate in comets rather than asteroids where aqueous and thermal alteration ...
A.J. Westphal, A.L. Butterworth, Bradley, Bradley, Brownlee, Brownlee, Chernick, Dai, Flynn, Flynn, Flynn, Flynn, Fraundorf, Fraundorf, Germani, Ishii, Jarosewich, Kasten, Kelly, Krot, Leroux, Leroux, Liou, M.A. Marcus, MacKinnon, Manceau, Marcus, Marcus, Marcus, Mason, Mason, Mason, Nier, O'Day, Ogliore, Ogliore, R.C. Ogliore, Rambaldi, Rietmeijer, Rubin, S.C. Fakra, Sandford, Schramm, Simon, Stodolna, Thomas, Thomas, Urey, Warren, Warren, Westphal, Westphal, Wooden, Yanai, Z. Gainsforth, Zolensky, Zolensky, Zolensky   +57 more
core   +1 more source

MOx/Rh Metallene with Energetic Interfaces as Efficient Bifunctional Electrocatalyst for Durable Water Splitting

Advanced Science, EarlyView.
 . ABSTRACT Developing excellent activity and stability bifunctional electrocatalysts for alkaline water splitting remains challenging. This work constructs ultrathin MOx/Rh metallene heterostructures (M = Fe, Co, Ni) via atmosphere‐controlled solvothermal synthesis, achieving uniform MOx nanoclusters on Rh metallene with optimized interfaces. The FeOx/
Ruilong Wei, Yuner Lin, Shanshan Ye, Shuo Wang, Jing Gao, Chaochao Tao, Shengqian Wang, Pei Xiong, Hang Zhang, Hualan Xu, Shengliang Zhong   +10 more
wiley   +1 more source

Improving sensitivity of XANES structural fit to the bridged metal–metal coordination

Journal of Synchrotron Radiation
Hard X-ray absorption spectroscopy is a valuable in situ probe for non-destructive diagnostics of metal sites. The low-energy interval of a spectrum (XANES) contains information about the metal oxidation state, ligand type, symmetry and distances in the ...
S. V. Abrosimov, B. O. Protsenko, A. S. Mannaa, V. G. Vlasenko, S. A. Guda, I. A. Pankin, A. S. Burlov, Y. V. Koshchienko, A. A. Guda, A. V. Soldatov   +9 more
doaj   +1 more source

Stabilization of Single Metal Atoms on Graphitic Carbon Nitride: Synthetic Strategies and Emerging Applications

Advanced Science, EarlyView.
This review highlights recent advancements in stabilizing single metal atoms on graphitic carbon nitride emphasizing innovative synthesis strategies and emerging applications in electrocatalysis, photocatalysis and organic transformations, along with key challenges and future perspective. Abstract Emerging as a new frontier in catalysis science, single‐
Wenyao Zhang, Junjie Cui, Zhenjie Yao, Boyuan Zhu, Nithinraj Panangattu Dharmarajan, Ajayan Vinu, Junwu Zhu   +6 more
wiley   +1 more source

Determination of molybdenum oxidation state on the mechanochemically treated MoO₃

Хімія, фізика та технологія поверхні, 2015
The molybdenum oxidation degree in the MoO3 samples after mechanochemical treatment in various media (air, water, ethanol) has been studied by titration, EPR and XANES methods.
N. S. Kopachevska, A. K. Melnyk, I. V. Bacherikova, V. A. Zazhigalov, K. Wieczorek-Ciurowa   +4 more
doaj   +1 more source

Single‐Atom Pt Anchoring on Self‐Doped ZrO2@G‐C3N4 Nanostructure Enables Efficient Photocatalytic Seawater Hydrogen Evolution

Advanced Science, EarlyView.
Grain‐like Zr3+‐ZrO2 and Pt single atoms are integrated into an S‐scheme Zr3+‐ZrO2@g‐C3N4 heterostructure to enable efficient visible‐light‐driven seawater hydrogen production. The combined effect of Pt single‐atom sites and the S‐scheme charge‐transfer pathway accelerates carrier separation, preserves strong redox ability, and markedly enhances ...
Hezheng Sun, Yifan Guo, Xin Yu, Yajie Tian, Feng Gao, Bin Wang, Yanting Tang, Dani S. Assi, Vellaisamy A. L. Roy   +8 more
wiley   +1 more source

Axial F–Bi–Ov Electron Pump Drives Continuous Reconfiguration of Bi Sites for Efficient Photocatalytic N2 Reduction

Advanced Science, EarlyView.
Axial Fluorine and Light‐Induced Oxygen Vacancies Synergize as an Electron Pump to Lower N2 Activation Energy and Enable Sustained NH3 Synthesis on FBWO. ABSTRACT The electronic structure precision of single‐atom catalysts (SACs) represents a decisive factor limiting advancements in photocatalytic nitrogen reduction (NRR) efficiency.
Xiao Ge, Xinyi Wu, Hao‐tong Li, Xinya Liu, Jie‐jie Chen, Yuan Min, Xiaozhi Wang   +6 more
wiley   +1 more source

L3-edge X-ray spectroscopy of rhodium and palladium compounds

Journal of Synchrotron Radiation
L3-edge high-energy-resolution fluorescence-detection X-ray absorption near-edge structure (XANES) spectra for palladium and rhodium compounds are presented, with focus on their electronic structures. The data are compared with transmission XANES spectra
Hugo Alexander Suarez Orduz, Luca Bugarin, Sarina-Lena Heck, Paolo Dolcet, Maria Casapu, Jan-Dierk Grunwaldt, Pieter Glatzel   +6 more
doaj   +1 more source