Results 101 to 110 of about 41,619 (168)

Recent Advances in Tailoring Active Site Microenvironments of Fe–N–C Catalysts for Oxygen Reduction

ChemistryEurope, Volume 4, Issue 2, February 2026.
This review summarizes the main factors affecting Fe–N–C catalysts for ORR: activity depends on active site structure, electronic configuration, and porosity, while stability is limited by metal leaching, carbon degradation, and inactive phase formation.
Mudassar Maqsood, Lebin Cai, Samona Zahid, Zhuangzhi Sun, Jianrui Zhang, Bao Yu Xia, Yaqiong Su   +6 more
wiley   +1 more source

Quantitative Analysis of Ferrate(VI) and Its Degradation Products in Electrochemically Produced Potassium Ferrate for Waste Water Treatment

Applied Sciences
Potassium ferrate(VI) (K2FeO4) as a particularly strong oxidant represents an effective and environmentally friendly waste water treatment material. When produced by anodic oxidation in highly alkaline aqueous solution, the K2FeO4 product is separated ...
Zoltán Homonnay, Sándor Stichleutner, Ernő Kuzmann, Miklós Kuti, Győző G. Láng, Kende Attila Béres, László Trif, Dániel J. Nagy, Gyula Záray, József Lendvai   +9 more
doaj   +1 more source

An In Situ ATR‐FTIR Electrochemical Cell for the Study of Battery Processes: Design, Implementation, and Data Analysis

Chemistry–Methods, Volume 6, Issue 2, February 2026.
Phenomena occurring in the electrolyte as well as the interfaces with the electrodes, such as Li+ solvation/desolvation and solid–electrolyte interphase formation, govern the performance and safety of Li‐ion batteries. In this article, a dedicated, spring‐loaded operando attenuated‐total‐reflectance Fourier‐transform infrared cell is presented ...
Daniela M. Josepetti, Ilie Hanzu, Nicolas Louvain, Lorenzo Stievano, Long Hoang Bao Nguyen   +4 more
wiley   +1 more source

Twists and Turns of Liquid Crystals Unravelled by Small‐Angle Scattering

Small Methods, Volume 10, Issue 3, 9 February 2026.
X‐ray scattering provides valuable insights into material structure and self‐assembly. This review discusses the use of small‐ and wide‐angle X‐ray scattering (SWAXS) as well as grazing incident SWAXS for examining self‐assembled systems, especially liquid crystals.
Jessie Wong, Jean‐Luc Brousseau, Hatem M. Titi   +2 more
wiley   +1 more source

Selective Halide Incorporation in P2‐Na0.66Fe1/3Mn2/3O2 Cathodes: Revealing a Compositional Regime for Enhanced Cycling

Small Structures, Volume 7, Issue 2, February 2026.
In this study, anionic substitution with A = F−, Cl−, and Br− of Na0.66Fe1/3Mn2/3O2−xAx (with x < 0.2), which is used as a cathode material in sodium‐ion batteries, was investigated. It was found that 0.02 mol F can be incorporated into NFMO without the formation of secondary phases.
Anna Domgans, Ngoc Thanh Thuy Tran, Sebastian Speer, Asghar N. Kayani, Frederik Zantis, Tobias Braun, Kristian Schaps, Chih‐Long Tsai, Hermann Tempel, Luc Raijmakers, Shih‐kang Lin, Anna Windmüller, Rüdiger‐A. Eichel   +12 more
wiley   +1 more source

Obscuration of Crystalline Ca‐Sulfate in XRD and Raman Data When Coated by Amorphous Ferric Sulfate: Implications for the Amorphous Components at Gale Crater

Journal of Geophysical Research: Planets, Volume 131, Issue 2, February 2026.
Abstract Throughout Gale crater on Mars, the Curiosity rover has found high abundances (15–73 wt%) of X‐ray amorphous materials in the rocks and sediments. The composition of this amorphous fraction is primarily calculated by subtracting crystalline abundances measured by the Chemistry & Mineralogy X‐Ray Diffractometer (CheMin) from bulk elemental ...
R. J. Hopkins, A. D. Rogers, L. Ehm
wiley   +1 more source

Common misconceptions in crystallography and crystal optics

Journal of Applied Crystallography, Volume 59, Issue 1, Page 239-247, February 2026.
Six recurrent misconceptions in crystallography, some involving mineral and crystal optics, are analyzed and discussed. The explanation of these and similar misconceptions could serve as educational resources for teachers.Did you know that an X‐ray diffraction pattern is not a spectrum?
Lluís Casas
wiley   +1 more source

Disappearance of peculiarly large atomic displacement in the high‐temperature phase of magnetite with substitution of Fe2+ by Ni2+ and Mn2+

Acta Crystallographica Section B, Volume 82, Issue 1, Page 98-107, February 2026.
Structures of Fe2.992O4 (magnetite), Fe3–x–yMnx□yO4 (x ≤ 0.980) and Fe3–x–yNix□yO4 (x ≤ 0.513, □ denotes point defects) are examined at room temperature. The observed disappearance of peculiarly large mean‐square displacement at the B site along the 3 axis in [111] is interpreted as a disappearance of phonons interact with electrons in the high ...
Takumi Kitamura, Takahiro Niimi, Hiroki Okudera   +2 more
wiley   +1 more source

O2‐Aktivierung an einem enzymatischen diFe‐Zentrum: Brückenligand‐Substitutionen ändern die Fe(II)/Fe(II) (Hydro)peroxo‐Bindung

Angewandte Chemie, Volume 138, Issue 5, 28 January 2026.
Durch Austausch der verbrückenden Carboxylate in DiFe‐Suleythrin wird die Koordination des Brückenliganden von 1,3‐Carboxylat zu 1,1‐Carboxylat verschoben, wodurch alle drei diFe(II)‐Koordinationsmotive in einem Protein entstehen. Dies verkürzt den Fe‐Fe‐Abstand und erhöht die Reaktivität mit O2.
Jae‐Hun Jeoung, Stefan Rünger, Kilian Weißer, Jakob Ruickoldt, Samriddhi Bhattacharya, Christian Limberg, Holger Dobbek   +6 more
wiley   +1 more source

Fe-%18,79Mn-%4,53Ni Alaşımında Termal Etki ile Oluşan Martensitik Faz Dönüşümlerinin Fiziksel Özelliklerinin İncelenmesi

Süleyman Demirel Üniversitesi Fen-Edebiyat Fakültesi Fen Dergisi, 2016
Özet: Bu çalışmada, Fe-%18,79Mn-%4,53Ni alaşımında termal etki ile oluşturulan martensitik faz dönüşümlerinin kristalografik ve manyetik özellikleri araştırıldı. Taramalı Elektron Mikroskobu (SEM) ile termal etkili martensitelerin mikroyapıları incelendi.
Nermin KAHVECİ YAĞCI, Dilek TÜRK
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