Results 61 to 70 of about 549 (136)
Advanced Energy Materials, Volume 16, Issue 29, 5 August 2026.Ir‐based double perovskites restructure during acidic oxygen evolution electrocatalysis through dissolution of non‐Ir cations and convergence toward IrOx active‐site motifs with similar structure and intrinsic activity across compositions. The identity of the dissolving cations controls dissolution and surface reconstruction kinetics, clarifying how ...
Harrison H. Lippie +5 more
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NEXAFS and XPS Studies of Co Doped Bismuth Magnesium Tantalate Pyrochlores
ChemistryCo doped bismuth magnesium tantalate with a pyrochlore structure (sp. gr. Fd-3m) was synthesized for the first time using the standard ceramic method. Single phase Bi2Mg1−xCoxTa2O9 samples were found to be formed when x < 0.7 in the X-ray phase analysis.
Nadezhda A. Zhuk +4 more
doaj +1 more source
The Structure of Spinels: A Quantitative Assessment of the AB2X4 Family
Journal of the American Ceramic Society, Volume 109, Issue 8, August 2026.ABSTRACT Compounds with the general formula AB2X4 crystallize with the atomic structure of the mineral spinel, MgAl2O4, described by three degrees of freedom: lattice parameter a, anion parameter u, and cation inversion parameter λ. Here, bond valence sum validation of 1244 ambient structures (338 compositions, 1915–2025) from the Inorganic Crystal ...
Nik Reeves‐McLaren
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Boletín de la Sociedad Española de Cerámica y Vidrio, 2002 In the Pb-Mg-Nb-O system, excess Mg and excess Nb incorporation into the B-site of PMN pyrochlore were investigated along the compositons of Pb1.83Mg0.29+xNb1.71-xO6.39-1.5x where x=0.1, 0.2, 0.3, 0.4, 0.522 and Pb1.83Mg0.29-xNb1.71+xO6.39+1.5x where x=0.
Mergen, A.
doaj
Effect of Oxide Filler Chemistry on Sintering and Phase Evolution of Polymer‐Derived SiC Composites
Journal of the American Ceramic Society, Volume 109, Issue 8, August 2026.This study investigates pressureless sintering and phase evolution in polymer‐derived SiC–oxide composites containing Y2Si2O₇ or Gd2Zr2O₇ fillers. The results show that oxide filler chemistry governs apparent densification, phase stability, and local microstructure, with Y2Si2O₇ behaving primarily as a passive filler and Gd2Zr2O₇ promoting reaction ...
Reilly Boros +6 more
wiley +1 more source
ChemSusChem, Volume 19, Issue 13, 14 July 2026.This review examines high‐entropy perovskites (HEPs) as a promising catalyst platform for energy and environmental applications. The focus is on configurational entropy engineering, design and synthesis, and computational understanding. These materials possess tunable active sites, enhanced stability, and improved electronic interactions, leading to ...
K. Aravinthkumar +3 more
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The Study of Mixed Pyrochlores
, 1973 Department of Chemistry, Institute of Science, Nagpur and Rajararn College, Kolhapur Manuscript received 30 August 1972; accepted 6 February 1973 The Study of Mixed ...
V. S. DARSHANE, V. V. DESHPANDE
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High-entropy pyrochlores with low thermal conductivity for thermal barrier coating materials
Journal of Advanced Ceramics, 2019 High-entropy pyrochlore-type structures based on rare-earth zirconates are successfully produced by conventional solid-state reaction method. Six rare-earth oxides (La2O3, Nd2O3, Sm2O3, Eu2O3, Gd2O3, and Y2O3) and ZrO2 are used as the raw powders.
Fei Li +4 more
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Toward Fast Proton Shuttling in Acidic Oxygen Evolution Reaction
Advanced Functional Materials, Volume 36, Issue 59, 23 July 2026.This review establishes proton transfer dynamics as a descriptor governing acidic OER activity, moving beyond the kinetic constraints derived from the proton coupled electron transfer. We discuss how deprotonation governs classical mechanisms, including adsorbate evolution mechanism (AEM), lattice oxygen mechanism (LOM) and oxide path mechanism (OPM ...
Ashish Gaur +3 more
wiley +1 more source