The suppression of the Jahn–Teller distortion elevates oxygen evolution reaction activity for Mn_3−xCo_xO₄ (0 ≤ <italic>x</italic> &lt; 1).

Sr₂VFeAsO_3−δ remarkably enhances the oxygen evolution reaction by direct O–O bond formation between OH⁻ coupled oxygen-vacant sites.

We have revealed that solution plasma assisted Mn-doping is a powerful strategy for enhancing the durability and activity of Co-based OER catalysts, where enhanced by factor 11 Ca 3 Co 4 O 9 .

We have prevented lattice collapse and developed an OER catalyst with both high activity stability by slightly increasing Ir-dissolution balancing the elemental dissolution in BaIr 1− x Mn O 3 for reconstructing rigid catalytic surface.

In this study, we investigated the enhancement of sinterability and suppression sintering aid segregation in lithium-ion conductor LiTa2PO8 (LTPO) through a nano-coating approach with MgO. Our findings reveal that technique significantly improves sinterability, requiring less additive compared to conventional methods. The sintered ceramic exhibited total conductivity 8.5×10⁻⁵ S cm⁻¹, highlighting efficacy method enhancing while mitigating issues.

The OER activity of Ca_1−xSr_xRuO₃ is remarkably enhanced at the metal–insulator boundary by strong electron–electron correlation.

Abstract The oxygen evolution reaction (OER) plays a key role in emerging energy conversion technologies such as rechargeable metal‐air batteries, and direct solar water splitting. Herein, remarkably low overpotential of ≈150 mV at 10 mA cm −2 disk alkaline solutions using one the non‐Fermi liquids, Hg 2 Ru O 7 , is reported. displays rapid increase current density excellent durability an OER catalyst. This outstanding catalytic performance realized through coexistence localized d‐bands with...

Ensuring the stability of cathodes under high voltage (>4.3 V vs. Li/Li + ) necessitates particle-scale surface protection. Research varies on optimal structure, and systematic studies impact nanoscale coating coverage cathode particle surfaces are lacking. This study presents a quantitative analysis homogeneity dependency particles their conditions. A metal alkoxide precursor-based methodology was used, manipulating structure by understanding pH dependence zeta potential for core altering...

A tetragonal perovskite PbMnO(3) was obtained by treating the 6H hexagonal phase at 15 GPa and 1273 K. Structural analysis using synchrotron X-ray diffraction suggested that crystallizes in centrosymmetric space group P4/mmm, unlike PbTiO(3) PbVO(3) which have a polar structure P4mm. Iodometric titration revealed presence of oxygen deficiency x = 0.06 for PbMnO(3-x). The 3C phases exhibited antiferromagnetic ordering 155 20 K, respectively.

A series of high-entropy superconductors, ROBiS2 (R = La + Ce Pr Nd Sm), have been successfully grown in the form single crystals using CsCl flux. The obtained a platelike shape with size 0.5–2.0 mm and thickness 70–450 μm, they are cleavable along c-plane. c-axis lattice constants similar values 13.47–13.57 Å. was mixed-valence state, comprising both Ce3+ Ce4+. On other hand, Sm showed only trivalent state. superconducting transition temperatures were approximately 2–4 K. temperature...

The structural stability of cubic KMF3 (M: Mg, Zn, Co, Ni) perovskites has been studied by powder X-ray diffraction under pressure. Neither superlattice reflections nor peak splitting associated to a phase transition were detected in the 0–10 GPa pressure range. Furthermore, KMgF3 showed no changes up 50 GPa. results compared with previous reports on isostructural KMnF3. Tolerance factor and site parameters ratio have analysed as high-pressure indexes for this family perovskites.

Dehydroxylation and incorporation of CO2 in mica (sericite-2M1) during high-temperature annealing has been investigated detail using infrared (IR) spectroscopy. The dehydroxylation is characterized by a dramatic change the OH- ion spectrum appearance or development different extra species (CO2, CO32-, OH-). A significant decrease K-O bond strength complex distortion silicon-oxygen tetrahedra were also observed. general similarities between spectra untreated dehydroxylated sericite show that...

We present x-ray, neutron scattering, and heat capacity data that reveal a coupled first-order magnetic structural phase transition of the metastable mixed-valence postspinel compound Mn${}_{3}$O${}_{4}$ at 210 K. Powder diffraction measurements structure in which Mn${}^{3+}$ spins align antiferromagnetically along edge-sharing $a$ axis, with propagation vector $k=[1/2,0,0]$. In contrast, Mn${}^{2+}$ spins, are geometrically frustrated, do not order until much lower temperature. Although...

Co3O4 represents an intriguing strongly correlated system since it is a spin liquid originating from A-site magnetic frustration. We conducted in-situ high pressure synchrotron x-ray diffraction experiments on Co3O4, and found two new monoclinic phases with the P121/c1 C12/m1 structures. These are distinct structures that were previously reported for other 3d transition metal spinel oxides. The charge transfer does not drive normal to transform into symmetry equivalent inverse spinel,...

Results of in situ high pressure x-ray powder diffraction on the mixed valence compound Cs2Au(I)Au(III)I6 (CsAuI3) are reported, for pressures up to 21 GPa a diamond anvil cell under hydrostatic conditions. We find reversible pressure-induced tetragonal orthorhombic structural transition at 5.5-6 GPa, and amorphization 12-14 GPa. Two alternative structures proposed high-pressure phase, discussed context possible Au transition.

We conducted in situ angle dispersive high pressure x-ray diffraction experiments on Sr3Ir2O7 up to 23.1 GPa at 25 K with neon as the transmitting medium. Pressure induces a highly anisotropic compressional behavior seen where tetragonal plane is compressed much faster than perpendicular direction. By analyzing different aspects of data, second-order structural transition observed approximately 14 GPa, which accompanied by insulating state nearly metallic 13.2 previously (Li et al 2013 Phys....

${\mathrm{Sb}}_{2}{\mathrm{O}}_{3}$-based materials are of broad interest in science and industry. High-pressure study using diamond anvil cells shows promise obtaining new crystal electronic structures different from their pristine states. Here, we conducted situ angle dispersive synchrotron x-ray-diffraction Raman spectroscopy experiments on $\ensuremath{\alpha}\text{\ensuremath{-}}{\mathrm{Sb}}_{2}{\mathrm{O}}_{3}$ up to 50 GPa with neon as the pressure transmitting medium. A first-order...

Abstract The structure of CaIrO 3 post-perovskite has been determined using CAD4 and Bruker SMART diffractometers for two different crystals. In both cases the was solved by Direct Methods which revealed all four atoms in asymmetric unit. Anisotropic refinement gave (CAD4/SMART): R 1 = 0.016/0.008, wR 2 0.032/0.009. There is excellent agreement between models studies. However, some notable differences were found structures here that reported Sugahara et al. , (2008): most obviously, we...

We report the electronic structure of Mn3O4 postspinel for first time. In contrast with spinel, adopts a CaMn2O4-type built-in strain. conducted both optical measurements and ab initio calculations, systematically studied band structures spinel phases. The theoretical is consistent absorption spectra, display characteristic band-splitting conduction band. gap phase 0.9–1.3 eV smaller than that phase. This difference can be explained by lowering Mn3+ 3d eg level related to strain structure....

Intraperitoneal transplantation of hepatocytes encapsulated with calcium alginate gel produced a marked improvement in the survival rate (75%) rats D-galactosamine (D-gal)-induced acute hepatic failure (AHF) when compared to 50% undergoing free hepatocyte (HCTX). The viability was still 70% at 36 h after transplantation, and gradual serum glutamic oxaloacetic transaminase (GOT) total bilirubin values observed HCTX. Moreover, arterial blood ketone body ratio (AKBR) remained within normal...

Synthesis of hybrid particles with core–shell structure by a coating on primary has attracted attention in various research fields. Therefore, techniques have been proposed for using dry, wet, and vapor processes. This review paper specifically examines wet processing among these technologies summarizes the currently technologies. Additionally, employed many that use homogeneous nucleation spray technique, but chemical reactions heterogeneous are crucially important achieving thinner more...

This study investigated the viability of Hf and/or W doping in Li7La3Zr2O12 (LLZO) through an alkoxide derived sol-gel process aimed at stabilizing ion-conductive cubic garnet phase. Results revealed that tends to favor tetragonal phase, while co-doping with and effectively stabilizes structure. stabilization is attributed similar ionic radii Hf4+ (0.71 Å) slightly smaller W6+ (0.62 compared Zr4+ (0.72 Å), considering charge neutrality. In both scenarios, a coexisting Li-deficient pyrochlore...