Copper-cerium mixed oxide catalysts have gained ground over the years in the field of heterogeneous catalysis and especially in CO oxidation reaction due to their remarkable performance. In this study, a series of highly active, atomically dispersed copper-ceria nanocatalysts were synthesized via appropriate tuning of a novel hydrothermal method. Various physicochemical techniques including electron paramagnetic resonance (EPR) spectroscopy, X-ray diffraction (XRD), N2 adsorption, scanning electron microscopy (SEM), Raman spectroscopy, and ultraviolet-visible diffuse reflectance spectroscopy (UV-Vis DRS) were employed in the characterization of the synthesized materials, while all the catalysts were evaluated in the CO oxidation reaction. Moreover, discussion of the employed mechanism during hydrothermal route was provided. The observed catalytic activity in CO oxidation reaction was strongly dependent on the nanostructured morphology, oxygen vacancy concentration, and nature of atomically dispersed Cu2+ clusters.

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A trinuclear iron(III) oxo‐centered complex [Fe3(μ3‐O)(3‐OCH3‐salnec)3]OH·5H2O was synthesized and characterized as cluster containing the semi‐cubane [Fe3(μ3‐O)]7+ core. The central oxygen atom is bridging the three iron(III) ions, which form an equilateral triangle with an average edge of –3.00 Å as it was deduced from X‐ray diffraction studies. The new tetradentate ligand 3‐OCH3‐salnecH2 = 1‐[1‐hydroxy‐2‐(9′‐methyl‐1,10′‐phenanthrolin‐2‐yl)ethyl]‐3‐methoxyphenol‐2, was generated “in situ” during the synthesis process as a product of the addition reaction between the starting ligands 2,9‐dimethyl‐phenanthroline(neoc) and 3‐methoxy‐salicylaldehyde(3‐OCH3‐saloH2), in the presence of sodium methoxide and Fe3+. Variable‐temperature magnetic measurements indicate antiferromagnetic exchange interactions between the iron(III) ions in the cluster. Additionally, spectroscopic (IR, UV/Vis, Mössbauer, EPR) and electrochemical studies (CV) are presented and discussed.

The reaction of a lanthanide(III) nitrate (Ln = Pr, Nd, Gd, Dy, Er) with 3-methoxy-salicylaldehyde(3-OCH(3)-saloH), afforded neutral complexes of the general formula [Ln(3-OCH(3)-salo)(3)], which were characterized by means of elemental analysis, FT-IR spectra, TG-DTA curves, and magnetic measurements. The released products, due to the thermal decomposition were analyzed by on-line coupling MS spectrometer to the thermobalance in argon, allowed to prove the proposed decomposition stages. In order to confirm the stability scale provided on the basis of the onset decomposition temperature, a kinetic analysis of the three decomposition stages was made using the Kissinger equation, while the complex nature of the decomposition kinetics was revealed by the isoconvertional Ozawa-Flynn-Wall method