Results 71 to 80 of about 40,331 (294)

X-ray absorption study of Ti-bearing silicate glasses [PDF]

, 1994
Ti K-edge XANES spectra have been collected on a series of Ti-bearing silicate glasses with metasilicate and tetrasilicate compositions. The intensity of the preedge feature in these spectra has been found to change with glass composition and varies from
Dingwell, Donald B., Mottana, Annibale, Paris, Eleonora, Romano, Claudia, Seifert, Friedrich   +4 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

The state of palladium and copper on the surface of freshly prepared low temperature carbon monoxide oxidadation catalyst PdCl₂-CuCl_2/γ-Al₂O₃

Тонкие химические технологии, 2010
The EXAFS/XANES, XRD, SEM methods were used for examination of freshly prepared low temperature carbon monoxide oxidation in air catalyst PdCl2-CuCl2/γ-Al2O3 active components states.
D. N. Titov, L. G. Bruk, I. V. Oshanina, O. N. Temkin, G. M. Kuz’micheva, Ya. V. Zubavichus, A. A. Veligzhanin, N. V. Sadovskaya   +7 more
doaj  

Determination of the high-pressure crystal structure of BaWO4 and PbWO4

, 2006
We report the results of both angle-dispersive x-ray diffraction and x-ray absorption near-edge structure studies in BaWO4 and PbWO4 at pressures of up to 56 GPa and 24 GPa, respectively.
A. Le Bail, A. Mujica, A. Muñoz, A. Segura, A. W. Sleigth, B. O. Loopstra, Ch. Ferrer-Roca, D. Errandonea, E. Knittle, F. J. Manjón, G. Aquilanti, I. Kawada, J. Beintema, J. López-Solano, J. Pellicer-Porres, M. Daturi, M. Nikl, O. Tschauner, P. Rodríguez-Hernández, P. W. Richter, R. S. Kumar, R. W. G. Wyckoff, S. Li, S. Radescu, T. Fujita, W. Jeitschko   +25 more
core   +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

Evidence of defect-induced ferromagnetism in ZnFe$_{2}$O$_{4}$ thin films

, 2011
X-ray absorption near-edge and grazing incidence X-ray fluorescence spectroscopy are employed to investigate the electronic structure of ZnFe$_{2}$O$_{4}$ thin films.
Esquinazi, P., Golmar, F., Heluani, S. P., Torres, C. E. Rodríguez, Ziese, M.   +4 more
core   +1 more source

XANES Study of Structural Disorder in Amorphous Silicon [PDF]

, 1990
An investigation of the structure of several amorphous silicon (a-Si) films is presented. Samples were prepared by using the ion beam sputtering technique at different substrate deposition temperatures.
Bianconi, A.,, Cicco, A. Di,, Coluzza, C.,, Flank, A.M.,, Lagarde, P.,, Marcelli, A.,, Rudolf, P.,   +6 more
core   +3 more sources

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

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

Ambidentate coordination in hydrogen bonded dimethyl sulfoxide, (CH3)2SOH3O+, and in dichlorobis(dimethyl sulfoxide) palladium(II) and platinum(II) solid solvates, by vibrational and sulfur K-edge X-ray absorption spectroscopy [PDF]

, 2009
The strongly hydrogen bonded species (CH3)(2)SO center dot center dot center dot H3O+ formed in concentrated hydrochloric acid displays a new low energy feature in its sulfur K-edge X-ray absorption near edge structure (XANES) spectrum.
Abbasi, Alessio, Alessio, Alireza Abbasi, Bennett, Calligaris, Damian, Damian Risberg, Damian Risberg, Davies, Degen, Emiliana Damian Risberg, Goggin, Jaswal, Johnson, János Mink, Konovalov, Küchle, Laszló Hajba, Magnus Sandström, Mikhail Yu. Skripkin, Mink, Molla-Abbassi, Ohba, Patric Lindqvist-Reis, Pelissier, Shibaeva, Skripkin, Takazawa, Taylor, Tranquille, Tranquille, Éva Bencze   +32 more
core   +1 more source