Report

Metal Oxide Combinatorial Synthesis and Characterization Yaniv Bouhadana Simcha Meir Assaf Anderson Sven Rühle Arie Zaban Eli Rosh-Hodesh Hannah-Noa Barad Institute for Nanotechnology & Advanced Materials Bar Ilan Universtiy, Ramat Gan 52900 [email protected] 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 Methodology Combinatorial Material Science Metal Oxides Combinatorial Synthesis • Data Mining, DOE, Computational Chemistry Based on our parallel research in All-Oxide PV. Data Mining Data Analysis • High Throughput Analysis Methods Analysis Analysis • High Throughput Synthesis Methods Synthesis • Combinatorial Research Concepts Combinatorial Outlines Synthesis long term stability Combinatorial Why Oxides? Low Cost synthesis/fabrication Data Mining Abandon materials Analysis Non-hazardous materials Abundance of Elements Combinatorial Combinatorial Material Science - Concept Synthesis Analysis Data Mining Combinatorial Combinatorial Material Science Synthesis Analysis Data Mining 60 “useful” elements which are the constituents of 60 x 60 = 3600 binary compounds (A-B, still not includes AxB, 60 x 60 x 60 = 216,000 ternary compounds (A-B-C…) ABx etc..) most known Synthesis ~30.000 inorganic compounds Combinatorial Combinatorial Material Science ~3% known Analysis Data Mining High TC Superconductors Combinatorial Proof of Concept: Synthesis Analysis Data Mining Combinatorial New Composite Oxides Synthesis Analysis new new crystalline amorphous phase phase polycrystalline composite material – bifunctional catalysts. Data Mining low impurity concentration (doping) Combinatorial Combinatorial Material Science Synthesis Analysis Data Mining The Ultimate Oxide Electro Catalist Materials Combinatorial Combinatorial Synthesis Methods Synthesis Spray Pyrolysis Pulse Laser Deposition Analysis (+Multi-Source Sputtering) Data Mining Pulsed Laser Deposition Combinatorial Combinatorial Synthesis Methods Continuous Compositional Spread (CCS) Synthesis Analysis Data Mining SrTiO3 + Co3O4 Combinatorial Composite Oxide Synthesis Co3O4 Data Mining Co3O4 Analysis Jsc SrTiO3 Jsc Scanning Optical Characterization Scanning Electric Conductivity Scanning X-Ray Diffraction (soon) Data Mining Scanning Seebeck Effect (planned) Analysis Scanning Profilometer Synthesis Scanning Electrochemical Characterization Combinatorial Large Throughput Analysis BioLogic Potentiostat (includes FRA Module) Tango XYZ table. Perestaltic Punp (RS485/232 controled). Silent vacume pump + solution trup. Special smaple holder (secured). Spacial surface Portable electrocemical cell. Tubing. Operating softwere. Analisys softwere. Data Mining Softwere: Analysis Mechanics: Synthesis Electronics: Combinatorial Scanning Electrochemical Meas. Synthesis Analysis At the initial stage the measurement that is preformed in the electrochemical scanner is cyclic voltammetry and the percentage of oxygen is constant. Combinatorial Electrochemical Scan Procedure Data Mining Combinatorial Scanning Electrochemical Meas. foil : preferred – platina foil, current – stainless steel. Solution In Ref Counter Synthesis Portable electrochemical cell • 3 Electrodes Cell: – Counter : any metallic – Working : the Analysis combinatorial samples bases on FTO. – Reference : Ag/AgCl (Kalomel) , PdS K3Fe(CN)6/K4Fe(CN)6/KCl Solution Out Data Mining Electrolyte : Polysulfide, designed by Dr. Assaf Anderson Combinatorial Scanning Optical Characterization Synthesis Analysis What can we extract? absorption coefficient thickness band gap Data Mining What do we measure? Total Transmission Total Reflection Specular Reflection 350 – 1100 nm d(x,y) = d0 · cosnx(x-x0) · cosny(y-y0) Combinatorial Scanning Profilometer Synthesis Analysis Data Mining What can we extract? conductivity σ / resistivity ρ thickness activation energies (planned) Synthesis What do we measure? I-V curve (2 point or 4 point contact) temperature dependent (planned) Combinatorial Scanning Conductivity Analysis Data Mining Example: Resistance of ZnO with linear thickness gradient (planned) What can we extract? Seebeck coefficient type of doping (n or p) Synthesis What do we measure? Voltage Combinatorial Scanning Seebeck Effect Meas. Heater Analysis Seebeck Coefficient Data Mining SA, SB = Thermopower or Combinatorial Scanning X-Ray Diffraction Synthesis Analysis Data Mining What can we extract? phase analysis, structural data Synthesis SnO2 Combinatorial Presentation of Results Analysis Data Mining Combinatorial Database and Data Mining Synthesis Analysis Data Mining Combinatorial Database and Data Mining Synthesis Analysis Data Mining The Ultimate Oxide Electro Catalist Materials Combinatorial Material Science – Concept Combinatorial Synthesis Methods Spray Pyrolysis/ PLD Synthesis Let’s look into the unknown Combinatorial Summary High Throughput Analysis electrochemical , etc. Analysis optical, conductivity, profilometer, Data Mining and Theoretical Chemistry predict our next research items. Data Mining Proof of Concept, lookout for trendlines and Thank you for your attention! 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