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Metal Oxide Combinatorial Synthesis and Characterization

Metal Oxide Combinatorial Synthesis and Characterization. Yaniv Bouhadana Assaf Anderson Eli Rosh- Hodesh Hannah- Noa Barad Simcha Meir Sven Rühle Arie Zaban. Institute for Nanotechnology & Advanced Materials Bar Ilan Universtiy , Ramat Gan 52900 yaniv.phd@gmail.com.

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Metal Oxide Combinatorial Synthesis and Characterization

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  1. Metal Oxide Combinatorial Synthesis and Characterization • Yaniv Bouhadana • AssafAnderson Eli Rosh-Hodesh Hannah-NoaBarad • Simcha Meir • Sven Rühle ArieZaban Institute for Nanotechnology & Advanced MaterialsBar Ilan Universtiy, Ramat Gan 52900yaniv.phd@gmail.com

  2. What is Our Main Goal? Cheng, F., & Chen, J. (2012).. Chemical Society reviews, 41(6), 2172–92. We want to find an efficient, durable, low cost electro-catalyst for metal air batteries

  3. Methodology

  4. Outlines Based on our parallel research in All-Oxide PV.

  5. Why Oxides? • long term stability • Low Cost synthesis/fabrication • Non-hazardous materials • Abandon materials

  6. Combinatorial Material Science - Concept Abundance of Elements

  7. Combinatorial Material Science

  8. Combinatorial Material Science • 60“useful” elements which are the constituents of • ~30.000 inorganic compounds • 60 x 60 = 3600binary compounds (A-B, still not includes AxB, ABx etc..)  most known • 60 x 60 x 60 = 216,000ternary compounds (A-B-C…)  ~3% known

  9. Proof of Concept: High TC Superconductors

  10. New Composite Oxides new crystalline phase new amorphous phase polycrystalline composite material – bi-functional catalysts. low impurity concentration (doping)

  11. Combinatorial Material Science The Ultimate Oxide Electro Catalist Materials

  12. Combinatorial Synthesis Methods Spray Pyrolysis Pulse Laser Deposition (+Multi-Source Sputtering) Fully Computerized

  13. Combinatorial Synthesis Methods • Pulsed Laser Deposition • Continuous Compositional Spread (CCS)

  14. Composite Oxide SrTiO3+ Co3O4 Co3O4 Jsc Co3O4 SrTiO3 Jsc

  15. Large Throughput Analysis • Scanning Electrochemical Characterization • Scanning Optical Characterization • Scanning Profilometer • Scanning Electric Conductivity • Scanning X-Ray Diffraction (soon) • Scanning Seebeck Effect (planned)

  16. Scanning Electrochemical Meas. Electronics: • BioLogicPotentiostat (includes FRA Module) • Tango XYZ table. • PerestalticPunp (RS485/232 controled). • Silent vacume pump + solution trup. Mechanics: • Special smaple holder (secured). • Spacial surface Portable electrocemical cell. • Tubing. Softwere: • Operating softwere. • Analisyssoftwere.

  17. Electrochemical Scan Procedure At the initial stage the measurement that is preformed in the electrochemical scanner  is cyclic voltammetry and the percentage of oxygen is constant.

  18. Portable electrochemical cell Scanning Electrochemical Meas. 3 Electrodes Cell: Counter : any metallic foil : preferred – platina foil, current – stainless steel. Working : the combinatorial samples bases on FTO. Reference : Ag/AgCl (Kalomel) , PdS Electrolyte : Polysulfide, K3Fe(CN)6/K4Fe(CN)6/KCl Ref Counter Solution In Solution Out

  19. Scanning Optical Characterization designed by Dr. Assaf Anderson • What do we measure? • Total Transmission • Total Reflection • Specular Reflection • 350 – 1100 nm • What can we extract? • absorption coefficient • thickness • band gap

  20. Scanning Profilometer d(x,y) = d0 · cosnx(x-x0) · cosny(y-y0)

  21. Scanning Conductivity • What do we measure? • I-V curve (2 point or 4 point contact) • temperature dependent (planned) • What can we extract? • conductivity σ / resistivity ρ • thickness • activation energies (planned) Example: Resistance of ZnO with linear thickness gradient

  22. Scanning Seebeck Effect Meas. (planned) • What do we measure? • Voltage • What can we extract? • Seebeck coefficient • type of doping (n or p) Heater SA, SB = Thermopower or Seebeck Coefficient

  23. Scanning X-Ray Diffraction • What can we extract? • phase analysis, structural data

  24. Presentation of Results SnO2 FeO2

  25. Database and Data Mining

  26. Database and Data Mining The Ultimate Oxide Electro Catalist Materials

  27. Summary • Combinatorial Material Science – Concept •  Let’s look into the unknown • Combinatorial Synthesis Methods •  Spray Pyrolysis/ PLD • High Throughput Analysis •  optical, conductivity, profilometer, electrochemical , etc. • Data Mining and Theoretical Chemistry •  Proof of Concept, lookout for trendlines and predict our next research items.

  28. Thank you for your attention! Yaniv.phd@gmail.com

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