Since the discovery of the metallic antiferromagnetic (AF) ground state near superconductivity in iron pnictide superconductors1–3, a central question has been whether magnetism in these materials arises from weakly correlated electrons4,5, as in the case of spin density wave in pure chromium6, requires strong electron correlations7, or can even be described in terms of localized electrons8,9 s...

The electrochromic property of nickel doped vanadium pentoxide (V2O5) deposited by a co-sputtering system is investigated. structural analysis the thin film was done an X-ray diffraction (XRD) analyzer. surface morphology studied field emission scanning electron microscopy (FE-SEM). composition detected Auger analysis. properties device were measured cyclic voltammetry. For undoped V2O5 film, c...

The electrocatalytic production of hydrogen peroxide (H2O2) through the two-electron oxygen reduction reaction (ORR) requires cost-effective catalysts with high selectivity, activity, and stability. Herein we report synthesis assessment nickel–nitrogen–carbon (Ni–N–C) electrocatalysts to gain insight into ORR activity selectivity toward H2O2. depended on amount nickel added during as well pH el...

Drying well-mixed Ni(CH 3 COO) 2 -PVP solution results in incorporation of metal precursor NPs throughout the polymer sheets. Adjusting salt content leads to produce N-doped and Ni-decorated rGO which is an effective electrocatalyst for H production from tri(ammonium) phosphate.

Chemical and magnetic states of iron doped tin oxide (SnO2) as a diluted magnetic semiconductor (DMS) at room temperature have been investigated using 57Fe Mössbauer spectrometry, XRD and magnetometery. The influence of the doping conditions of SnO2 with iron on the generation of oxygen defects was reviewed and discussed on the basis of ab initio calculations. The magnetic properties depended o...

The Er-doped LiNi0.5Mn1.5O₄ (LiNi0.495Mn1.495Er0.01O₄) sample was successfully prepared by citric acid-assisted sol-gel method with erbium oxide as an erbium source for the first time. Compared with the undoped sample, the Er-doped LiNi0.5Mn1.5O₄ sample maintained the basic spinel structure, suggesting that the substitution of Er3+ ions for partial nickel and manganese ions did not change the i...

In the present study, solid oxide cells (SOCs) were operated in electricity generation (solid fuel cell, SOFC) mode and hydrogen production electrolysis SOEC) mode. The electrodes fabricated with nickel-gadolinia doped ceria (Ni-GDC) nickel-yttria stabilized zirconia (Ni-YSZ) composites investigated. correlations between changes microstructure degradation of electrochemical performance are disc...

the doped S = 1 antiferromagnet Ni(Cl1−xBrx)2-4SC(NH2)2 at high magnetic fields Maxime Dupont, 2, ∗ Sylvain Capponi, 2, † Mladen Horvatić, ‡ and Nicolas Laflorencie § Laboratoire de Physique Théorique, IRSAMC, Université de Toulouse, CNRS, UPS, France Department of Physics, Boston University, 590 Commonwealth Avenue, Boston, Massachusetts 02215, USA Laboratoire National des Champs Magnétiques I...

Nitric oxide (NO) storage and release measurements have been recorded for Ni-doped CPO-27 (Mg) and CPO-27 (Zn), and the biological effect of the released NO was assessed in porcine coronary artery relaxation tests. The results indicate that the doping strategy leads to increased levels of NO storage and delivery compared to the parent materials and that the NO dosage and biological response can...

Nitrogen-doped carbon nanotubes decorated with Co and Ni metal nanoparticles were assessed as counter electrodes (CEs) of dye-sensitized solar cells (DSSCs). These composites show good electrocatalytic activity toward the counter electrode reduction reaction (I3(-)→ I(-)) in DSSCs. The resulting devices using these composites as CEs display photovoltaic performance as good as, or even better th...