The hydrogen evolution reaction (HER) on aluminum and stainless steel cathodes in ammonium sulfate solution was investigated by linear sweep voltammetry and electrochemical impedance spectroscopy. The catalytic effects of NH4+ on the HER were markedly inhibited on aluminum, and the rate-determin...

In the present paper the effects of anionic surfactant sodium octyl sulphate (SOS) on the electrodeposition of manganese from sulphate solutions were studied. It was observed that addition of SOS increases the current efficiency and hence decreases the energy consumption during electrodeposition...

Precipitation of manganese from the SO2-roast leach ammoniacal ammonium sulfate solution bearing both high and low concentrations of manganese in the presence of copper, cobalt and nickel ions was carried out in a stainless steel reactor fitted with a turbo grid. Air/O2 was used to precipitate M...

:The electrolytic manganese residues (EMRs) contain variable amounts of trace metals and valuable elements, which can negatively impact the environment. This research focused on recovering valuable elements (SO42−, NH3N, Mn, Mg, and Fe) from EMRs by bioleaching. Bacteria (Y1) were isolated from ...

In this study, pulse current (PC) electrodeposition method was successfully introduced to the process of manganese electrodeposition. The results showed that, due to the transient high current density, pulse electrolysis can rise cathode overpotential (larger 90–100 mV than the direct current (...

Recent advances in inductively coupled plasma mass spectrometry (ICP-MS) have included the addition of interference reduction technologies, such as collision and reaction cells, to improve its detection capability for certain elements that suffer from polyatomic interferences. The principle behi...

The objective of this article is to use the example of the development of metal oxide catalysts for the selective ammoxidation and oxidation of propylene to illustrate successful catalyst design strategies for achieving enhanced yields of acrylonitrile and acrolein, respectively. The processes o...

Flux compositions based on an Na2CO3 /MoO3 flux and firing conditions were determined for the growth of single crystals of vanadium-doped ZrSiO4, HfSiO4, ZrGeO4 and HfGeO4 as well as chromium-doped ZrSiO4 and terbium-doped ZrGeO4. It was found that the vanadium concentration in the crystals of Z...

The V (5 wt.%) doped In2O3 (V: In2O3) thin films with the thickness of 50–150 nm were deposited on to glass substrate by electron beam evaporation technique and the deposited films were annealed at 200 °C in air for 2 h. The annealed films were characterized by structural, electrical, optical ...

Luminescence, luminescence excitation, IR, and Raman spectra of europium and terbium isomeric pyridine-carboxylates: isonicotinates, nicotinates and picolinates were studied. The ways of the excitation energy transfer from the ligand to Ln3+ were analysed in dependence on the structure and the t...

The use of a flow through solid phase terbium-sensitized luminescence system is described for the determination of the widely used fluoroquinolone norfloxacin. A chelate between the terbium ion and the analyte is formed online previously to the sample injection into the carrier stream. Then the ...

Simple sol-gel method was used to synthesize nanoscale yttrium phosphate-vanadates with general formula YP1−xVxO4: 1 at. % Tb3+ (x = 0–1.0). The nanopowder samples were characterized by X-ray diffraction (XRD), infrared spectroscopy (FTIR), scanning electron microscopy (SEM) and room temperatur...

The interaction of NO2N2O4 with terbium sesquioxide, lanthanum oxide, vanadium sesquioxide, and perovskite phase PrCrO3 has been studied as a function of the temperature of interaction and the pressure of NO2. Two methods of investigation have been employed: (a) analysis of the reacted species...

The high-performance thermochromic vanadium dioxide (VO2) films can be applied in many industrial applications such as smart windows, infrared sensors, and infrared imaging (bolometers). The preservation of its highly thermochromic properties of VO2 films is crucial since the oxidation number of...

The present work investigates the number and nature of the surface active sites, selectivity and turnover frequency towards methanol selective oxidation of a series of bulk metal vanadates. The catalysts were synthesized through an organic route and characterized by laser Raman spectroscopy, X-r...

A palladium-nickel doped sulfated zirconia was prepared, and hydrogen spillover and bimetallic synergic effect were confirmed using this model catalyst. Isomerization of n-hexane indicated that palladium and nickel could enhance both the conversion rates and selectivity. The XRD and BET results ...

A palladium-mediated double oxidative amination reaction on cyclohexa-2,5-dienes has been developed, leading to the tetracyclic indoline skeleton of aspidosperma and strychnos alkaloids. The allyl-palladium intermediate, generated after the double oxidative amination, could be trapped by an inte...

We report a facile one-pot synthesis of well-dispersed Pd nanoparticles on a carbon nanofiber (CNF) support, achieved via the unique sequential processes of supramolecular self-assembly and fast reduction of the Pd source. Pd ions attached to the sulfate ends of sodium dodecyl sulfate (SDS) mole...

A series of palladium complexes bearing ferrocene substituted α-diimine ligands was synthesized and investigated for ethene polymerization at different conditions to modulate the extent of “chain-walking” mechanism and regulate branching and topology of resulting polyethylenes. All ferrocene ...

Palladium and silver nanoparticles (NPs) anchored at the outer surface of ferritin form stable suspension of non-coated particles that possess several catalytic and enzymomimetic activities. These activities are strongly affected by detergents that significantly influence the reaction efficiency...