نتایج جستجو برای: rhenium catalyst
تعداد نتایج: 45649 فیلتر نتایج به سال:
Semiconducting two-dimensional transition metal dichalcogenides are emerging as top candidates for post-silicon electronics. While most of them exhibit isotropic behaviour, lowering the lattice symmetry could induce anisotropic properties, which are both scientifically interesting and potentially useful. Here we present atomically thin rhenium disulfide (ReS2) flakes with unique distorted 1T st...
Bimetallic platinum–rhenium catalysts supported on activated carbon were tested for the hydrodeoxygenation (HDO) of isoeugenol at 250 °C and 30 bar H2 in a batch reactor. The characterized by inductively coupled plasma atomic emission spectrometry (ICP-IES), N2 physisorption, electron microscopy (high-angle annular dark-field scanning transmission (HAADF-STEM), (TEM)), temperature-programmed re...
A redox cycle between Ce4+ and Ce3+ is the elementary step in water gas shift (WGS) mechanism. Facilitating a +4 +3 of cerium enhanced formation oxygen vacancy which considered as dominate factor for developing WGS performance stability ceria material. Therefore, this work, we have tried to facilitate CeO 2 enrich activity. The reaction was carried out on Ni catalyst supported by Gd-doped (GDC)...
Molybdenite is the major source of Re in the Earth’s crust. Mineralogical data, chemical analyses and scanning electron microscopy techniques have been used in this study to document Re behavior in molybdenite, affected by hypogene and near-surface processes. XRD study of molybdenite samples indicate that the molybdenites are of the 2H polytype.The patterns of rhenium distribution in molybden...
The first synthesis of a CF3-substituted semisquarate was accomplished via nucleophilic trifluoromethylation using CF3SiMe3 and subsequent rhenium-catalyzed allylic alcohol rearrangement. The short-step skeletal-divergent synthesis of trifluoromethylated functional molecules was successfully achieved using the CF3-substituted semisquarate as the platform.
Theoretical studies on the hypoelectronic metalladicarbaboranes CpMC(2)B(n-3)H(n-1) (M = Mn, Re; n = 9, 10, 11) having 2n skeletal electrons indicate that true isocloso MC(2)B(n-3) deltahedra are highly energetically favored in which the metal atom occupies the single degree 6 vertex. This contrasts with the previously studied isoelectronic diferradicarbaboranes Cp(2)Fe(2)C(2)B(n-3)H(n-1) for w...
Rhenium complex []Cl with the coordinated [11]ane-P(2)C(NHC) macrocycle was obtained by a metal template controlled ring formation reaction; in this reaction a coordinated NH,NH-stabilised imidazolidin-2-ylidene ligand was connected via the nitrogen atoms to two phenyl substituents of a 2-fluorophenyl substituted diphosphine ligand.
To understand the aqueous species important for transport of rhenium under supercritical conditions, we conducted a series of solubility experiments on the Re–ReO2 buffer assemblage and ReS2. In these experiments, pH was buffered by the K–feldspar–muscovite–quartz assemblage; fO2 in sulfur-free systems was buffered by the Re–ReO2 assemblage; and fO2 and fS2 in sulfur-containing systems were buf...
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