Ivana Perović

Vinča Institute of Nuclear Sciences | VIN · Department of Physical Chemistry

An application of the laser-induced breakdown spectroscopy technique (LIBS) for the elemental analysis of pig shoulder bone samples is reported. Measurements were performed using a compact laboratory-made LIBS system based on the TEA CO2 laser and time-integrated signal detection. The recorded spectra consisted of well-defined atomic and single-cha...

Against the background of escalating global electronic waste (e-waste) and its rich reservoir of elements, this research addresses the exploitation of precious metals from discarded CPUs for potential applications in hydrogen production. The study systematically explores the influence of varied CPU sample preparation techniques on the formation of...

Green hydrogen produced by alkaline electrolysis is a promising solution to address the world’s increasing energy demand while mitigating greenhouse gas emissions. However, the efficient and cost-effective production of green hydrogen via alkaline electrolysis requires improvements. This paper presents an in situ activation process that simplifies...

The development of carbon materials with desirable textures and new aqueous electrolytes is the key strategy to improve the performance of supercapacitors. Herein, a deep eutectic solvent (DES) was used for in situ templating of a carbon material. A carbon material was characterized (XRD, N2- physisorption, FTIR, SEM and EDS) and used as an electro...

The capacitance and operating voltage of supercapacitors as well as their energy density have been increased by development of different materials and electrolytes. In this paper, two strategies, for the first time, were used to improve energy density: Mn3O4- and N-dual doped carbon electrode and aqueous mixture of multivalent ions as electrolyte....

Purpose: Unfortunately, the use of Chemical Warfare Agents (CWA) as a weapon of choice is still a terrorist and military practice despite the International Chemical Weapons Convention. Due to their extremely hazardous and lethal characteristics, they can be used only in a strictly controlled environment (laboratories and isolated platforms) by trai...

Special attention in this work is devoted to the influence of laser radiation on the possibility of improving the activity of electrodes for the hydrogen evolution reaction. Using TEA CO2 lasers, Co and Mo based electrode coatings were modified and their morphology, composition and electrocatalytic activity were examined. It was found that the lase...

In this paper we synthesised new hybrid porous carbon/MWCNT material using ionic liquid. Characterization of surface chemistry showed that hybrid porous carbon/MWCNT material, beside oxygen functionalities, has nitrogen as well as sulphur surface functional groups. This hybrid material was further tested as electrode material for multivalent ions e...

Co-Mo carbides were prepared by impregnation with aqueous solution of metal salts and sucrose into ordered mesoporous SBA-15 silica template using carbothermal hydrogen reduction. Bimetallic Co-Mo carbide obtained by using carbothermal hydrogen reduction of Co-Mo precursors is formed when the Co-Mo molar ratio is 1.0. The obtained samples were char...

p>A systematic ab initio (DFT-GGA) study of adsorption of various oxygen species on graphene has been performed in order to find out general trends and provide a good starting point to analyze the oxidation of more complex carbon materials. Particular attention was paid to finding an appropriate supercell model. According to our findings, atomic O...

A systematic ab initio (DFT GGA) study of adsorption of various oxygen species on graphene has been performed in order to find out general trends and provide a good starting point to analyze the oxidation of more complex c arbon materials. Particular attention was paid to finding an appropriate supercell model. According to our findings, atomic O i...

Cost and durability are two major factors that delay large-scale production and commercialization of PEMFC’s. One of the technologically ready application of the proton exchange membrane fuel cells (PEMFC) is in the combined heat and power systems (µCHP), which are used in the individual households or buildings. The performance of the µCHP systems...

Cost and durability are two major factors that delay large-scale production and commercialization of PEMFC’s. One of the technologically ready application of the proton exchange membrane fuel cells (PEMFC) is in the combined heat and power systems (µCHP), which are used in the individual households or buildings. The performance of the µCHP systems...

The kinetics of the oxygen reduction reaction (ORR) greatly influences the performance and the costs of electrodes in fuel cells. Commercial platinum based electrocatalysts exhibit the highest performance, but also increase the cost of the fuel cells. On the other hand, carbon based platinum catalyst support is subject to oxidation, which causes ag...

AbstractCost and durability are two major factors that delay large-scale production and commercialization of PEMFC’s. One of the technologically ready application of the proton exchange membrane fuel cells (PEMFC) is in the combined heat and power systems (µCHP), which are used in the individual households or buildings. The performance of the µCHP...

AbstractCost and durability are two major factors that delay large-scale production and commercialization of PEMFC’s. One of the technologically ready application of the proton exchange membrane fuel cells (PEMFC) is in the combined heat and power systems (µCHP), which are used in the individual households or buildings. The performance of the µCHP...

This manuscript presents contribution on the improved efficiency of the alkaline electrolytic production of hydrogen by in situ adding activating compounds directly into the electrolyte during the electrolytic process. New electrode material, ternary system, Ni–Cu–Mo, was applied as activating compound i.e. ionic activator. The energy requirements...

Fuel cell application of tungsten carbide is revisited starting with four different tungsten carbide precursors used for high temperature synthesis. It was shown that the final products greatly depend on the nature of the precursor. Using tungsten peroxide/2-propanol derived precursor almost pure WC was obtained which was subjected to further elect...

In this manuscript we have presented the results of the use of ternary ionic activator in the alkaline water electrolysis. Novel Ni–Co–Mo based ionic activator was added in-situ to standard electrolyte. Energy consumption of the alkaline electrolyzer was determined at different current densities and elevated temperatures. Energy saving was higher a...

In this contribution, we present results of electrochemical characterization of prepared tungsten carbide supported palladium and platinum and Vulcan XC-72 supported palladium. These catalysts were employed as anode catalysts in PEMFC and results are compared to commercial platinum catalyst. Platinum seems to be irreplaceable as a proton exchange m...

Nickel electrodes are widely used in industrial water electrolysis cells for electrochemical production of hydrogen. To avoid extensive deactivation problems and enhance the efficiency of the electrolyser cathode, in this work in situ activation is proposed using ionic activator (i.a.) based on combination of three d-metals: Zn, Co and Mo. Polariza...

Poly(vinyl alcohol) (PVA) is a polyhydroxy polymer, which is very common in practical applications because of its easy preparation and biodegradability. In this work, the alkaline solid polymer electrolyte membrane, based on potassium hydroxide doped PVA, was proposed for the fuel cell applications, aiming at a new cost-effective, easy preparing an...

Objective of this work was to investigate the electrocatalytic efficiency using quasi-potentiostatic, galvanostatic and impedance spectroscopy techniques of the Ni–W catalysts obtained by in situ electrodeposition in an alkaline, 6 M KOH, electrolyser. Synergetic effect is observed, with its maximum at industrial conditions (high temperature and cu...

The aim of this work is to investigate the energy consumption of alkaline electrolyser with the in situ added ionic activators. Several concentrations of nickel and tungsten based ionic activators were used in the same alkaline electrolyser, and the energy consumption was calculated and compared to conventional electrolyte. The electrolyser operate...