Results 71 to 80 of about 85,730 (276)

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

Irreversible proliferation of magnetic moments at cleaved surfaces of the topological Kondo insulator SmB6

, 2017
The compound SmB$_6$ is the best established realization of a topological Kondo insulator, in which a topological insulator state is obtained through Kondo coherence.
Augustin, Edwin, Breitweiser, S. Alexander, Chiu, Janet, Cho, B. K., Chuang, Yi-De, Denlinger, Jonathan, He, Haowei, Kang, Boyoun, Miao, Lin, Min, Chul-Hee, Reinert, Friedrich, Wexler, Surge, Wray, L. Andrew   +12 more
core   +1 more source

Microscopic Insights into Magnetic Warping and Time‐Reversal Symmetry Breaking in Topological Surface States of Rare‐Earth‐Doped Bi2Te3

Advanced Materials, EarlyView.
Magnetic doping of the topological insulator Bi2Te3 with erbium adatoms induces out‐of‐plane magnetism and breaks time‐reversal symmetry, opening a Dirac gap and driving a Fermi surface transition from hexagonal to star‐of‐David geometry. Microscopy, spectroscopy, and magnetic dichroism reveal atomically controlled magnetic interactions that tailor the
Beatriz Muñiz Cano, Fabián Calleja, Ji Dai, Massimo Tallarida, Vera Marinova, Alessandro Barla, Marc G. Cuxart, Pierluigi Gargiani, Gonzalo N. Molina, José Angel Silva‐Guillén, Adriana I. Figueroa, Kevin García‐Díez, Sergio O. Valenzuela, Aitor Mugarza, Amadeo L. Vázquez de Parga, Rodolfo Miranda, Francisco Guinea, Manuela Garnica, Miguel A. Valbuena   +18 more
wiley   +1 more source

Energy-synchronized X-ray absorption spectroscopy photoemission electron microscopy at Shanghai Synchrotron Radiation Facility (SSRF) for materials science

Journal of Synchrotron Radiation
This study develops an integrated X-ray absorption spectroscopy (XAS) photoemission electron microscopy (PEEM) platform on beamline BL09U at the Shanghai Synchrotron Radiation Facility (SSRF), enabling nanoscale characterization of complex materials ...
Junqin Li, Guanhua Zhang, Julong Sun, Zilong Zhao, Ying Zou, Zhenhua Chen, Fangyuan Zhu, Yaobo Huang, Yong Wang, Zefeng Ren, Renzhong Tai, Xueming Yang   +11 more
doaj   +1 more source

Synthesizing InxGa1−xAs using molten In and GaAs by the sessile drop method at 400–600 °C

AIP Advances, 2017
We studied the surface reaction between metallic In and a single-crystal GaAs substrate at 400–600 °C induced by the improved sessile drop method. Studying the surface morphology and microstructure using scanning electron microscopy, we found that many ...
Liang Zhao, Xiangdong Ding, Jingjuan Li, Shen Yang, Lei Zhao, Zuoxing Guo   +5 more
doaj   +1 more source

Effect of co-doping of donor and acceptor impurities in the ferromagnetic semiconductor Zn1-xCrxTe studied by soft x-ray magnetic circular dichroism

, 2011
We have performed x-ray absorption spectroscopy (XAS) and x-ray magnetic circular dichroism (XMCD) studies of the diluted ferromagnetic semiconductor Zn$_{1-\textit{x}}$Cr$_\textit{x}$Te doped with iodine (I) or nitrogen (N), corresponding to electron or
A Fujimori, C T Chen, D-J Huang, F-H Chang, H-J Lin, K Ishikawa, K Zhang, Kobayashi M, Ohno H, S Kuroda, T Kataoka, V R Singh, Y Yamazaki   +12 more
core   +1 more source

Solvent‐Free Thermal Defect Engineering in Molecular Frameworks With Volatile Linkers

Advanced Materials, EarlyView.
Thermal removal of neutral volatile linkers enables precise and solvent‐free generation of metal vacancies in MOFs. This strategy affords redox‐stable, coordinatively unsaturated FeII sites with tunable spin, ligand coordination, and catalytic behavior. The approach offers a general route to design defect‐functional materials through local coordination
Sonia Martínez‐Giménez, Alejandro Orellana‐Silla, Marta Galbiati, Efrén Navarro‐Moratalla, Luca Braglia, Sara Stolfi, José Antonio Real, Víctor Rubio‐Giménez, Sergio Tatay, Carlos Martí‐Gastaldo   +9 more
wiley   +1 more source

Operando Synchrotron X‐Ray Absorption Spectroscopy: A Key Tool for Cathode Material Studies in Next‐Generation Batteries

Advanced Science
Rechargeable batteries are central to modern energy storage systems, from portable electronics to electric vehicles. The cathode material, a critical component, largely dictates a battery's energy density, capacity, and overall performance.
Yameng Fan, Xin Wang, Guyue Bo, Xun Xu, Khay Wai See, Bernt Johannessen, Wei Kong Pang   +6 more
doaj   +1 more source

Iterative Bragg peak removal on X-ray absorption spectra with automatic intensity correction

Journal of Synchrotron Radiation
This study introduces a novel iterative Bragg peak removal with automatic intensity correction (IBR-AIC) methodology for X-ray absorption spectroscopy (XAS), specifically addressing the challenge of Bragg peak interference in the analysis of crystalline ...
Ryuichi Shimogawa, Nicholas Marcella, Christopher R. O'Connor, Taek-Seung Kim, Christian Reece, Igor Lubomirsky, Anatoly I. Frenkel   +6 more
doaj   +1 more source

X-ray absorption of liquid water by advanced ab initio methods

, 2017
Oxygen K-edge X-ray absorption spectra of liquid water are computed based on the configurations from advanced ab initio molecular dynamics simulations, as well as an electron excitation theory from the GW method. One one hand, the molecular structures of
Chen, Mohan, Kang, Wei, Klein, Michael L., Santra, Biswajit, Shen, Huaze, Sun, Zhaoru, Wang, Jianping, Wu, Xifan, Xu, Limei, Zheng, Lixin   +9 more
core   +1 more source