Miroslava Varničić

ORCID: 0009-0006-4751-924X
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About
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Research Areas
  • Electrochemical sensors and biosensors
  • Electrochemical Analysis and Applications
  • Electrocatalysts for Energy Conversion
  • Fuel Cells and Related Materials
  • Microbial Metabolic Engineering and Bioproduction
  • Conducting polymers and applications
  • Enzyme Catalysis and Immobilization
  • Advanced battery technologies research
  • Analytical Chemistry and Sensors
  • Catalytic Processes in Materials Science
  • Ionic liquids properties and applications
  • Microbial Inactivation Methods
  • Genetics, Bioinformatics, and Biomedical Research
  • Microbial metabolism and enzyme function
  • Enzyme-mediated dye degradation
  • Membrane-based Ion Separation Techniques
  • Microbial Metabolites in Food Biotechnology
  • Nanomaterials for catalytic reactions
  • Biofuel production and bioconversion
  • Innovative Microfluidic and Catalytic Techniques Innovation
  • Advanced Nanomaterials in Catalysis
  • Catalysis for Biomass Conversion
  • Microbial Fuel Cells and Bioremediation

Max Planck Institute for Dynamics of Complex Technical Systems
2012-2024

University of Belgrade
2021-2024

Max Planck Society
2012-2016

University Hospital Magdeburg
2014

Glucose was selectively oxidized to gluconic acid in a membraneless, flow-through electroenzymatic reactor operated the mode of co-generating chemicals and electrical energy. At anode enzyme glucose oxidase (GOx) combination with redox mediator tetrathiafulvalene (TTF) used as catalyst, while cathode equipped an cascade consisting GOx horseradish peroxidase (HRP). The influence electrode preparation procedure, structural operating parameters on performance investigated detail. Under...

10.1016/j.electacta.2015.05.151 article EN cc-by Electrochimica Acta 2015-06-13

This study examines the kinetics and mechanism of oxygen reduction reaction (ORR) on a polycrystalline rhodium electrode (Rh(poly)) in acidic alkaline media, using rotating disc measurements. found that ORR activity Rh(poly) decreases order 0.1 M NaOH > HClO4 0.05 H2SO4 concerning half-wave potentials. The Tafel slopes for cathodic direction are 60 120 mV dec−1 at low high overpotentials, respectively, perchloric acid solutions. However, strongly adsorbed sulfate anions hinder sulfuric...

10.3390/catal14050327 article EN Catalysts 2024-05-16

This research focuses on the rational design of porous enzymatic electrodes, using horseradish peroxidase (HRP) as a model biocatalyst. Our goal was to identify main obstacles maximizing biocatalyst utilization within complex structures and assess impact various carbon nanomaterials electrode performance. We evaluated as-synthesized nanomaterials, such Carbon Aerogel, Coral Carbon, Hollow Spheres, against commercially available Vulcan XC72 nanomaterial. The 3D electrodes were constructed...

10.3390/molecules29102324 article EN cc-by Molecules 2024-05-15

In the present work electrochemical and microscopic methods have been utilized to get more insight into complex relationship between preparation route, structure activity of porous enzymatic electrodes.

10.1039/c4ra07495e article EN cc-by-nc RSC Advances 2014-01-01

Electroenzymatic processes are interesting solutions for the development of new based on renewable feedstocks, energies, and green catalysts. High-selectivity sustainability these usually assumed. In this contribution, two aspects were studied in more detail. a membrane-less electroenzymatic reactor, 97% product selectivity at 80% glucose conversion to gluconic acid was determined. With help nuclear magnetic resonance spectroscopy, main side products identified. The yields D-arabinose formic...

10.3390/catal10030269 article EN Catalysts 2020-03-01

Hybrid nanomaterials based on manganese, cobalt, and lanthanum oxides of different morphology phase compositions were prepared using a facile single-step ultrasonic spray pyrolysis (USP) process tested as electrocatalysts for oxygen reduction reaction (ORR). The structural morphological characterizations completed by XRD SEM-EDS. Electrochemical performance was characterized cyclic voltammetry linear sweep in rotating disk electrode assembly. All synthesized materials found...

10.3390/met12010022 article EN cc-by Metals 2021-12-23

The main objective of this research was a systematic development advanced micro/nanostructured materials based on the most used metal-oxides for ORR and with an extremely low-loading Pt comparison. Hybrid composites compared were: MnO2, La2O3, mixed lanthanum manganese oxides (LMO), reduced platinum load (LMO-Pt). influence amount noble metal, as well single oxide activity toward ORR, analyzed. complete electrochemical performance hybrid has been performed by means CV, LSV, EIS. It shown...

10.3390/catal12060641 article EN Catalysts 2022-06-12
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