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Tailoring Nanostructured Catalysts in a Hydrogen Economy Prof. Paolo FORNASIERO Department of Chemistry University of Trieste, Italy

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Presentation on theme: "Tailoring Nanostructured Catalysts in a Hydrogen Economy Prof. Paolo FORNASIERO Department of Chemistry University of Trieste, Italy"— Presentation transcript:

1 Tailoring Nanostructured Catalysts in a Hydrogen Economy Prof. Paolo FORNASIERO Department of Chemistry University of Trieste, Italy Le filiere dell’energia- Trieste,

2 Electrolysis Reforming Fermentation + Reforming Gasification Pyrolysis + Reforming Biomass Geothermal Solar Carbon Oil Gas Hydro- electric Eolic H 2 PRODUCTION TECHNOLOGIES size of production cost of available feedstocks

3 H 2 PRODUCTION & PURIFICATION  Active and stable catalysts are required for large scale applications  Most efficient catalyst (electrodes) for H 2 utilization in Fuel Cells Proton Exchange Membrane Fuel Cells (PEM-FC)

4 encapsulation of preformed metal nanoparticles into MO x through different methodologies EMBEDDING APPROACH

5 2 O 3 FOR METHANE PARTIAL OXIDATION

6 Impregnated Protected 1% Rh impregnated vs 1% Rh 2 O 3 2 O 3 for MPO T. Montini, A. M. Condó, N. Hickey, F. Lovey, L. De Rogatis, P. Fornasiero and M. Graziani, Applied Catalysis B: Environmental 73 (2007) T = 750°C

7 FOR NH 3 DECOMPOSITION

8 for NH 3 DECOMPOSITION B. Lorenzut, T. Montini, C. C. Pavel, M. Comotti, F. Vizza, C. Bianchini and P. Fornasiero, ChemCatChem 2 (2010), GHSV 4000 mL g -1 h mL g -1 h -1 Reaction with pure NH 3 T = 500°C T = 700°C

9 2 for PHOTOCATALYTIC H 2 PRODUCTION

10 h > 3.0 eV Water splitting: Very low efficiency Organic molecule as sacrificial agents Renewable compounds

11 CO 2 V. Gombac, L. Sordelli, T. Montini, J. J. Delgado, A. Adamski, G. Adami, M. Cargnello, S. Bernal and P. Fornasiero, Journal of Physical Chemistry A 114 (2010), Experimental condition: - Medium pressure Hg lamp 125W g catalyst mL of solution - Argon flow 15 mL/min Ar in Ar out 2 for PHOTOCATALYTIC H 2 PRODUCTION Ethanol/water 1:1Glycerol 1M Evolution rate (  mol/h) Time (h) 2 Cu/TiO 2 vs H2H2

12 FE-SEM O 2 + H 2 O atmosphere granular Cu 2 O films… …CuO 1D nanoarchitectures 200 nm 550°C 1 μm 550°C dry O 2 atmosphere plane-viewcross-section plane-viewcross-section

13 Fornasiero P. et al., ChemSusChem 2009, 2, 230  Significantly betterperformances than commercial Cu x O (<580 L h -1 m -2 g -1 ) Photocatalytic splitting of H 2 O/CH 3 OH (1:1) solutions  Effect of catalyst recycling Radiation switched off for 12 h time / h  high time stability of the catalyst H 2 production/L h -1 m -2 g- 1 H 2 production UV-Vis (125 W) Vis (125 W) Activity normalized for the catalyst amount CuO

14 DEVELOPMENT OF ADVANCED ELECTRODES FOR SOFCs

15 Pd-S bond stable COOH-Ce bond stable Ce-OR bond not stable CORE-SHELL STRUCTURE DESIGN

16 2 (9%)/Al 2 O 3 Al 2 O 3 CO oxidation WGSR Methanol Steam Reforming JACS 2010, 132, DISPERSIBLE STRUCTURES AS BUILDING BLOCKS

17 ZrO 2 -based solid electrolite 8-YSZ Cathode: Perovskite ABO 3 La 1-x Sr x Ni 0.6 Fe 0.4 O 3-  Anode: LSCM + CeO 2 + Pd LSCM =La 0.8 Sr 0.2 Cr 0.5 Mn 0.5 O 3 Catalytic component CeO 2 -Pd ADVANCED ELECTRODES for SOFCs

18 50 μm 100 μm ADVANCED ELECTRODES for SOFCs: ANODE

19 -  15% -  26% -  43% Pd/CeO 2 -1 Pd/CeO Maximum power density (W/cm 2 ) Time (h) - 26 % - 42 % - 15 % ADVANCED ELECTRODES for SOFCs: ANODE


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