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Centre for Electrochemical Synthesis of Nanomaterials and Functional Coatings

Centre for Electrochemical Synthesis of Nanomaterials and Functional Coatings Faculty of Chemical Technology  Metalurgy Prof. Dr. Sc. Tamaz Agladze. tamazagladze@emd.ge. Basic Research Directions Novel Electrochemical Technique for Synthesis and Size Tuning of Metal Nanoparticles

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Centre for Electrochemical Synthesis of Nanomaterials and Functional Coatings

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  1. Centre for Electrochemical Synthesis of Nanomaterials and Functional Coatings Faculty of Chemical Technology Metalurgy Prof. Dr. Sc. TamazAgladze tamazagladze@emd.ge • Basic Research Directions • Novel Electrochemical Technique for Synthesis and Size Tuning of Metal Nanoparticles • Implementation of Metal and Composite Nanomaterials for: • Water Disinfection and Purification • Low-cost Three-way Catalytic Converters of Toxic Emissions • Novel Electrodeposited Metal Hydride Materials for Catalysis and Energy Storage

  2. Novel Electrochemical Technique for Synthesis and Size Tuning of Metal Nanoparticles T. Agladze at al. Z. Phys. Chem. 227 (2013) 1–13 • The technique provides an instrumental approach to multiparametric control over the rates of size determining processes such as nucleation, growth, stabilization and dispersion of metal clusters. • The particle size is tuned by variation in the residence time τR, during which metal cluster formed at a cathode in an aqueous electrolyte is allowed to adsorb amphiphile molecules of surfactant dissolved in an organic solvent is demonstrated. Core-Shell NPs Electrochemical cell for synthesis of metal nanozoles

  3. DSL patterns Ag TEM images Size Tuning Diam.(nm)-25.52 % Intensity-60.7 Diam.(nm)-22.6 % Intensity-56.2 Diam.(nm)-18.6 % Intensity-79.3 Variation in particle size with resident time

  4. Noble Metal Free Three-Way Catalytic Converters (TWC) TWC, (CO, CHx, Nox) which is the primary modern emission control technology on gasoline vehicles utilize precious metals (Pt, Pd, Rh) Target Noble metal free cost-effective high-performance TWC nanomaterials Max treatment temp. Catalyst 500°C 800°C 1000°C CO Convertsion, % Manganese Nanocomposite Test 100% conversion temperature • Heat Treatment 105-1000°C • 40 Cycles, toal 100 hours Temperature, °C

  5. Electrodeposited Manganese Hydride-Perspective Material for Catalysis and Energy Storage • MetastableMn-H is able to release hydrogen at a rate ~0,02gH2/s(atmospheric pressure, 70°C ) which meets DOE requirements for hydrogen storage materials • MnHx is synthesized, isolated and physic-chemical properties are studded for the first time H2 volume ,l/kgMn 30°C Time, min

  6. Thermo Phase Transformation   66° 54° 56°

  7. Electrochemical Phase Transformation T. Agladze at al. El. Acta, 2014 Potential, -E Electrochemical Multilayer  OPD (M ) Mn-H 0 E M Mn Mn-H Mn Dissolution (M )  UPD (Mn-H) 0,MS Phase Transformation E MH MH Decomposition     MS 0 Partial rates, lgi i0,MH iM  Magnetic Properties of the Phases

  8. Thank you

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