Results 81 to 90 of about 39,813 (246)

In situ photodeposition of ultra-small palladium particles on TiO2

Journal of Synchrotron Radiation
In situ and operando investigation of photocatalysts plays a fundamental role in understanding the processes of active phase formation and the mechanisms of catalytic reactions, which is crucial for the rational design of more efficient materials.
Elizaveta Kozyr, Sara Martí-Sánchez, Alina Skorynina, Jordi Arbiol, Carlos Escudero, Lorenzo Mino, Aram Bugaev   +6 more
doaj   +1 more source

Investigation of induced Pt magnetic polarization in Pt/Y3Fe5O12 bilayers

, 2012
Using X-ray magnetic circular dichroism (XMCD) measurements, we explore the possible existence of induced magnetic moments in thin Pt films deposited onto the ferrimagnetic insulator yttrium iron garnet (Y3Fe5O12).
Altmannshofer, Stephan, Geprägs, Stephan, Goennenwein, Sebastian T. B., Gross, Rudolf, Meyer, Sibylle, Opel, Matthias, Rogalev, Andrei, Wilhelm, Fabrice   +7 more
core   +1 more source

Mixed‐Metal Promotion in a Manganese‐Molybdenum Oxynitride as Catalyst to Integrate C─C and C─N Coupling Reactions for the Direct Synthesis of Acetonitrile from Syngas and Ammonia

Advanced Materials, EarlyView.
Transition metal oxy/carbo‐nitrides show great promise as catalysts for sustainable processes. A Mn‐Mo mixed‐metal oxynitride attains remarkable performance for the direct synthesis of acetonitrile, an important commodity chemical, via sequential C─N and C─C coupling from syngas (C1) and ammonia (N1) feedstocks.
M. Elena Martínez‐Monje, Wilson Henao, Tania Rodenas, Patricia Concepción, Virginia Pérez Dieste, Alexander Missyul, Giovanni Agostini, Gonzalo Prieto   +7 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

Tuning Amorphous‐Crystalline Catalytic Interfaces by Mechanochemistry: Cu‐Based Metallic Glasses Coupled with Ceria for CO Oxidation

Advanced Materials, EarlyView.
Ball‐milling Cu‐based metallic glasses with ceria creates a unique nanostructure where metallic glass particles are wrapped by CeO2 nanoparticles. The intimate integration triggers copper state reorganization during reaction and aging, boosting CO oxidation and COPrOx activity.
Maahin Mirzay‐Shahim, Mehran Nabahat, Laia Pascua‐Solé, Isabel Serrano, Ilaria Lucentini, Xènia Garcia, Marina Armengol‐Profitós, Asier Agrelo‐Lestón, Ignasi Burgués‐Ceballos, Núria J. Divins, Ignacio J. Villar‐Garcia, Virginia Pérez‐Dieste, Carlos Escudero, Carlo Marini, Jordi Llorca, Eloi Pineda, Pere Bruna, Lluís Soler   +17 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

In Situ Amine Formation to Modulate MOF‐Derived PdIn N‐Doped Carbon Catalysts

Advanced Materials, EarlyView.
An amine‐assisted approach converts PdIn‐MOF into PdIn intermetallic nanoparticles embedded in N‐doped carbon. In situ‐generated amines trigger early Pd nucleation, producing smaller PdIn domains than direct pyrolysis. Amine sterics and basicity tune composition and particle size, while solvent and amine co‐determine textural features.
Gonzalo Egea, Jordan Santiago Martinez, M. Asunción Molina, Jaime Mazarío, Lucy Costley‐Wood, Christian Cerezo‐Navarrete, Carlo Marini, Eduardo Villalobos‐Portillo, Andrew M. Beale, Pascual Oña‐Burgos   +9 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

Determination of oxygen vacancy limit in Mn substituted YSZ ceramics

, 2017
The series of Mnx(Y0.148Zr0.852)1-xO2-{\delta} ceramics was systematically studied by means of X-ray absorption and emission spectroscopy and DC magnetic susceptibility.
Bućko, Mirosław M., Kapusta, Czesław, Pomykalska, Daria, Sikora, Marcin, Stępień, Joanna   +4 more
core   +1 more source

Polymorph‐Specific Electronic Transduction in WO3 during Molecular Sensing

Advanced Materials, EarlyView.
Metal‐oxide polymorphs with similar surface chemistry can nevertheless exhibit distinct sensing properties. In γ‐ and ε‐WO3, analyte adsorption appears comparable; yet, only ε‐WO3 induces a pronounced lattice electronic perturbation that accommodates charge in sub‐conduction band minimum states.
Matteo D'Andria, Meng Yin, Stefan Neuhauser, Vlasis G. Mavrantzas, Ying Chen, Ken Suzuki, Andreas T. Güntner   +6 more
wiley   +1 more source