Novel entropy-stabilized fluorite oxides with multifunctional properties

Abstract

Development of new high-entropy oxides having configurational entropy dominating the phase stability has become a hot topic since the discovery of rock salt structure entropy-stabilized (MgCoNiCuZn)O in 2015. Herein, we...

High-entropy rare earth materials: synthesis, application and outlook

“…Kumar and co-workers introduced a series of innovative entropy-stabilized fluorite oxides. 133 They studied in more detail the temperature-dependent phase transitions of the fluorite oxides. A reversible transition between multiple phases and single phase was demonstrated through cyclic heat treatments, affirming that the thermodynamic stability is governed by configurational entropy.…”

Defect Engineering of High-Entropy Oxides for Superior Catalytic Oxidation Performance

“…Rock salt high-entropy oxides (HEOs), consisting of five or more equal molar metal cations, were first reported by Rost in 2015 . It is well established that HEOs have unique characteristics (such as large designing space, adjustable compositions, synergistic effect, multiple reactive sites, high durability, and low cost). − In particular, the catalytic properties of HEOs attract significant attention as they offer tremendous potential in alcohol oxidation reactions. Hence, a bloom of HEOs with various structures, for example, fluorite, perovskite, and spinel structures, are widely witnessed in applications of lithium-ion batteries, catalysts, dielectric materials, and energy storage. , At present, HEOs have been successfully fabricated by solid-state reaction, magnetron sputtering, thermal decomposition, nebulized spray pyrolysis, flame spray pyrolysis, hydrothermal, solution combustion, and coprecipitation .…”