The kinetics and reaction network of hydrodemetallation (HDM) reactions and the pattern of metal deposition have been investigated using a model residuum oil, consisting of nickel porphyrins (Nietioporphyrin (Ni-EP), Ni-tetraphenylporphyrin (Ni-TPP), and Nitetra(3-methylphenyl)porphyrin (Ni-T3MPP)) dissolved in a clean (N and S free) mineral oil. Reactions were carried out over a commercial CoO...

We report the Ni-doping effect on magnetism and superconductivity (SC) in an Eu-containing 112-type system $\mathrm{Eu}({\mathrm{Fe}}_{1\ensuremath{-}x}{\mathrm{Ni}}_{x}){\mathrm{As}}_{2}$ ($0\ensuremath{\le}x\ensuremath{\le}0.15$) by measurements of resistivity, magnetization, specific heat. The undoped ${\mathrm{EuFeAs}}_{2}$ undergoes a spin-density-wave (SDW) transition at ${T}_{\mathrm{SDW...

nowadays, doping is an intricate dilemma for athletes. wrestling is the domestic, national and popular sport in iran. meanwhile, the prevalence of drug abuse in wrestling is high due to its power-demanding nature. so, we decided to evaluate the knowledge of club wrestlers of tehran about doping and their estimates of current prevalence in the country. in a cross sectional study, 426 wrestlers w...

A crucial challenge in the commercialization of Ni-based materials as anode solid oxide fuel cell is fast voltage drop due to carbon deposition and structural degradation during operation. Herein, Sn-doped Ce0.8Sm0.2O2-? (SDC) supported Sn-Ni alloy rationally designed prepared, via a simple convenient dual-modification strategy. The substitution Sn Ce phase enhances mobility lattice oxygen SDC....

Tin dioxide (SnO2) represents an importantmetal-oxide group that can be suitable for a range of applications through the incorporation of dopants. For example, the electrical conductivity of intrinsic SnO2 depends strongly on the surface properties, as molecular adsorption/desorption will affect the band modulation and space-charge layer, which makes SnO2 an important conductance-type gas-sensi...

Under near-ambient pressure conditions, carbon monoxide molecules intercalate underneath an epitaxial graphene monolayer grown on Ni(111), getting trapped into the confined region at interface. On basis of ab-initio density functional theory calculations, we provide here a full investigation intercalated CO pattern, highlighting modifications induced electronic structure. For coverage as low 0....

Chlorinated aromatic compounds are important raw materials or intermediates in many industries, but they highly toxic and difficult to degrade the natural environment. Electrocatalytic dechlorination technology can transform chlorinated with high toxicity into substances low easy degradation, so it has broad application prospects. Compared other metal catalysts, Pd-based catalysts have highest ...

One practical solution for utilizing hydrogen in vehicles with proton-exchange fuel cells membranes is storing hydrogen in metal hydrides nanocrystalline powders. According to its high hydrogen capacity and low cost of production, magnesium hydride (MgH2) is a desired hydrogen storage system. Its slow hydrogenation/dehydrogenation kinetics and high thermal stability are the major barriers restr...

The catalytic properties of LaCoO3 in aqueous oxidation are explored as a function of doping. Both Sr substitution for La and Fe/Ni substitution for Co are studied. The reaction of interest is the aqueous epoxidation of crotyl alcohol with hydrogen peroxide. The reaction products are measured using GC, and the decomposition of hydrogen peroxide is studied using the volume of oxygen evolved duri...

Ni$_2$Mn$_{2-y}$In$_y$ alloys transform from the martensitic $L1_0$ antiferromagnetic ground state near $y = 0$ to austenitic ferromagnetic $L2_1$ Heusler phase 1$ due doping of In impurity for Mn. The off stoichiometric prepared by rapid quenching are structurally metastable and dissociate into a mixture (Ni$_2$MnIn) (NiMn) phases upon temper annealing. Despite this structural disintegration, ...