Results 41 to 50 of about 41,619 (168)

High‐Yield Synthesis of Fe‐NC Electrocatalysts Using Mg2+ Templating and Schiff‐Base Porous Organic Polymers

Advanced Functional Materials, EarlyView.
Fe─NC porous oxygen reduction electrocatalysts are prepared employing a 2,4,6‐Triaminopyrimidine‐based porous organic polymer, a Mg2+ Lewis acid, and a low‐temperature cation exchange protocol. Using the polymer precursor achieves high pyrolysis yields and results in atomically dispersed FeNx sites. The resulting catalysts feature hierarchical porosity
Eliot Petitdemange, Jinjie Zhu, Angus Pedersen, Joseph Parker, S. Esmael Balaghi, Shaohua Li, Silvia Favero, José Ignacio Martínez, Sarah Haigh, Maria‐Magdalena Titirici, Anna Fischer, Jesús Barrio   +11 more
wiley   +1 more source

Observation of nuclear gamma resonance with superconducting tunnel junction detectors

AIP Advances, 2016
Nb-based superconducting tunnel junction detectors have been used for the registration of electrons following a nuclear gamma resonance (Mössbauer effect).
M. G. Kozin, I. L. Romashkina, L. V. Filippenko, V. P. Koshelets   +3 more
doaj   +1 more source

Synchrotron Mössbauer spectroscopic study of ferropericlase at high pressures and temperatures [PDF]

, 2009
The electronic spin state of Fe^(2+) in ferropericlase, (Mg_(0.75)Fe_(0.25))O, transitions from a high-spin (spin unpaired) to low-spin (spin paired) state within the Earth’s mid-lower mantle region.
Gavriliuk, Alexander. G., Hu, Michael Y., Jacobsen, Steven D., Lerche, Michael, Lin, Jung-Fu, Sturhahn, Wolfgang, Zhao, Jiyong   +6 more
core  

Enhanced Nitric Oxide Electroreduction to Ammonia via Modulating Spin‐Polarization of Fe Single‐Atom Catalysts

Advanced Functional Materials, EarlyView.
A strategic spin‐polarization suppression in Fe single‐atom catalysts is proposed to enhance electrocatalytic reduction of NO to NH3. Employing a top‐down electrospinning strategy, self‐supported FeSAC with Fe‐N3S1 coordination structure and spin‐state transition is engineered from high‐spin to low‐spin.
Jialing Song, Ziqi Wei, Lupeng Han, Zhenlin Wang, Chenghao Fan, Donglin Han, Chunwei Dong, Haiyan Duan, Xiyang Wang, Sam Fong Yau Li, Eslam Hamed, Ming Xie, Emiliano Cortés, Dengsong Zhang   +13 more
wiley   +1 more source

An Advanced High‐Performance Ultrafast Ammonium‐Ion Aqueous Battery Based on Dual‐Metal Redox Open Framework Molecular Magnet

Advanced Science, EarlyView.
The Prussian Blue Analogue molecular magnet KMnFeHCF is demonstrated as a high‐performance cathode for ultra‐fast aqueous ammonium‐ion batteries. A full cell using KMnFeHCF and graphite delivers ~71 mAh g−1 at 1.25 A g−1 and ~51 mAh g−1 at 2.2 A g−1, retaining 50% capacity after 1850 cycles. Its scalability, cycling stability, and low cost offer strong
Nilasha Maiti, Pramod Bhatt, Manoj K Sharma, Sher Singh Meena, Mayuresh D Mukadam, Soumen Samanta   +5 more
wiley   +1 more source

Room temperature Mössbauer characterization of ferrite with spinel structure [PDF]

Science of Sintering
Cobalt ferrite (CoFe2O4) nanoparticle were obtained by different synthesis methods: coprecipitation (CO), ultrasonically assisted coprecipitation (US-CO), coprecipitation followed by mechanochemical treatment (MC-CO), microemulsion (ME) and microwave ...
Lazarević Zorica Ž., Milutinović Aleksandra, Umićević Ana, Ivanovski Valentin N., Koteski Vasil, Anđelković Ljubica, Ćurčić Milica   +6 more
doaj   +1 more source

Thermally activated magnetization reversal in bulk BiFe0.5Mn0.5O3

, 2013
We report on the synthesis and characterization of BiFe0.5Mn0.5O3, a potential type-I multiferroic compound displaying temperature induced magnetization reversal.
Bolzoni, Fulvio, Cabassi, Riccardo, Calestani, Gianluca, Delmonte, Davide, Gilioli, Edmondo, Lantieri, Marco, Mezzadri, Francesco, Migliori, Andrea, Pernechele, Chiara, Ritter, Clemens, Solzi, Massimo, Spina, Gabriele   +11 more
core   +1 more source

Overcoming the Trade‐Off Between Magnetic Coupling and Electrical Insulation in Soft Magnetic Materials via Nanochain Engineering

Advanced Science, EarlyView.
This study employs a nanochain engineering approach combined with an in situ oxidation strategy to fabricate self‐insulating iron‐based magnetic nanochains, addressing the challenge of balancing magnetic coupling and electrical insulation in soft magnetic materials.
Dingrong Zuo, Lichen Liu, Haibo Ke, Rongsheng Bai, Huaping Ding, Jing Zhou, Zhenxiang Cheng, Peng Yu, Weihua Wang   +8 more
wiley   +1 more source

Sigma-phase in Fe-Cr and Fe-V alloy systems and its physical properties

, 2011
A review is presented on physical properties of the sigma-phase in Fe-Cr and Fe-V alloy systems as revealed both with experimental -- mostly with the Mossbauer spectroscopy -- and theoretical methods.
Adams J. J., Andersson J.-O., Andersson J.-O., Baerlecken E., Bain E. C., Bastien P., Bergman G., Blachowski A., Blachowski A., Bungardt K., Camus P. P., Cerezo A., Chandra G., Chevenard P., Cieslak J., Cieślak J., Cieślak J., Cieślak J., Cieślak J., Cieślak J., Cieślak J., Cieślak J., Cieślak J., Cieślak J., Cieślak J., Cieślak J., Cieślak J., Cieślak J., Cook A. J., Costa B. F. O., Costa B. F. O., Costa B. F. O., Costa B. F. O., Dubiel S. M., Dubiel S. M., Dubiel S. M., Dubiel S. M., Ettwig H. H., Frank F. C., Frattini R., Greenfield P., Gupta A., Hall E. O., Herbstein F. H., Herbstein F. H., Jakub Cieślak, Japa E. A., Johnson W. A., Kabliman E. A., Kasper J. S., Kitchingman W. J., Kittel C., Kubaschewski O., Kumar K. C. H., Kuwano H., Le Caër G., Lezhnenko I. V., Lin J.-C., Martens H., Mikikits-Leitner A., Parsons D., Pavlů J., Pomey G., Read D. A., Read D. A., Schueller H.-J., Seki J.-I., Simdyankin S. I., Solly B., Stanisław M. Dubiel, Sumimoto Y, Treischke W., Ustinovshikov Y., Vilar R., Waanders F. B., Waanders F. B., Walker L. R., Wever F., Williams R. O., Williams R. O., Yakel H. L., Zeedijk H. B.   +81 more
core   +1 more source

Characterization of nanodimensional Ni-Zn ferrite prepared by mechanochemical and thermal methods. [PDF]

, 2010
Nickel zinc ferrite nanoparticles, Ni1−xZnxFe2O4 (x = 0, 0.2, 0.5, 0.8, 1.0), with dimensions below 10 nm have been prepared by combining chemical precipitation with high-energy ball milling.
B Kunev, C Estournès, D Paneva, E Manova, E Rivière, I Mitov, Roy M K   +6 more
core   +1 more source