Linear Hexane Isomerization Over Bimetallic Zeolite Catalysts

The aim of this study was to evaluate the activity and selectivity in isomerization of n-hexane of bimetallic zeolite catalysts containing a nickel transition metal in addition to palladium. Bimetallic bifunctional linear alkane isomerization catalysts based on the hydrogen form of MFI zeolite have been synthesized. The porous properties of the samples were investigated by means of low-temperature nitrogen adsorption/desorption, the size of the metal component – by TEM, and the catalytic properties – in the micro-pulse isomerization of n-hexane.

Voltammetric Determination of Pd(II) Using 5-Hydroxyimino-4-imino-1,3-thiazolidin-2-one after a Thermal Activation of the Interaction

The interaction of Pd(II) with 5-hydroxyimino-4-imino-1,3-thiazolidin-2-one (HITO) was investigated over the pH range of 1.0–10.0. Optimal conditions for the voltammetric determination of Pd(II) were established. A new voltammetric method of Pd(II) determination by the peak of complex using NaCl as a supporting electrolyte at pH 2.0 was developed with the limit of detection 2.0∙10-7 M. The study of the method’s selectivity was presented in the work.

n-Hexane Isomerization Over Nickel-Containing Mordenite Zeolite

Nickel-containing mordenite samples were synthesized by impregnation from aqua's solution of nickel nitrate. Porous and catalytic characteristics of the catalysts were studied by means of low temperature nitrogen adsorption/desorption and micropulse n-hexane isomerisation. The maximum isomer yields are 10-12 wt % for 1-5 wt % Ni content at 523–573 K.

Modification of Silicon Surface with Silver, Gold and Palladium Nanostructures via Galvanic Substitution in DMSO and DMF Solutions

The investigation results of silver, palladium and gold nanoscale particles deposition on the silicon surface in the DMSO and DMF media are presented. The influence of organic aprotic solvents on the geometry of metal particles and their distribution on the substrate is described. It is shown that solutions of stable metal complexes ([Ag (CN)2] – , [AuCl4] – ) are the main factor in the formation of discrete nanoparticles with a small range of sizes and uniform distribution along the substrate surface, as well as nanostructured films.

Voltammetric Determination of Rhodium by Means of Furan-Oxime Derivatives in Industrial Samples with Considerable Content of Palladium

The selectivity of rhodium(III) voltammetric determination by means of furan-oxime derivatives has been investigated. The proposed methods have been approved on model solutions and during the determination of rhodium(III) in the presence of palladium(II) in complex industrial samples.

Palladium Deposition on Magnesium in PdCl2 Solutions in DMF

Palladium deposition on rotational magnesium disk and magnesium powder via cementation has been investigated in 0.01 M PdCl2 solutions in dimethylformamide. The reduction process started from 323–333 K without the induction period. Spheroidal microparticles of palladium and its agglomerates were found to be formed on the magnesium disk surface. Particles in the form of needles and plates by the width of 80–120 nm were formed on the surface of magnesium powder. The deposited particles are characterized by high adhesion to the substrate surface.