The continuous economic growth due to the world’s expanding population results in an increase of global energy demand. The world energy consumption mainly concerns the use of fossil fuels followed by hydro and nuclear energy; the remaining part belongs to the renewable energies sources. The develop of alternatives for the generation of sustainable energy is an important research field which attracts much attention, since the fossil fuels are an energy sources that will exhaust in the coming decades 1. An important process is the conversion of solar energy into chemical ones 2 as happens in the natural photosynthetic process. Different research focused their works on the optimization of artificial system that reflects the photosynthesis in which the aim is to harmless the sunlight energy in combination with a catalytic system to conduct the photocatalytic water splitting in order to form oxygen and hydrogen 3. The research work developed in the Professor S. Rau’s research group, at University of Ulm, focused on photocatalysis targeted to the production of hydrogen using different photocatalysts in two different assembly: intramolecular and intermolecular systems. The study was divided in two parts, the aim of the first one is to find a new synthetic pathway, in order to obtain a pure intramolecular photocatalyst [(tbbpy)2Ru(tpphz)PtI2](PF6)2 for the photocatalytic hydrogen production. This photocatalyst was already synthetized in a not pure form in Rau’s research group by Dr. Pfeffer 4. The second parts compared the functioning in term of hydrogen catalytic efficiency of two intermolecular photocatalysts constituted by different ruthenium complexes as [(tbbpy)2Ru(tpphz)]( PF6)2 and [Ru(tbbpy)3](PF6)2 with the same catalytic centre represented by [(tbbpy)PtI2] compound. References: 1) Z. Yang, J. Zhang, M. C. W. Kintner-Meyer, X. Lu, D. Choi, J. P. Lemmon, J. Liu, Chem. Rev. 2011, 111, 3577–3613. 2) G. W. Crabtree and N. S. Lewis, Phys. Today, 2007, 60, 37–42. 3) J. H. Alstrum-Acevedo, M. K. Brennaman and T. J. Meyer, Inorganic Chemistry, 2005, 44, 20. 4)] M. G. Pfeffer, T. Kowacs, M. Wächtler, J. Guthmuller, B. Dietzek, J. G. Vos, S. Rau, Angew. Chem. Int. Ed. 2015, 54, 6627 –6631

The global energy demand: photocatalytic systems for hydrogen production.

D'AMATO, CHIARA ANNA;GIOVANNETTI, Rita;
2016

Abstract

The continuous economic growth due to the world’s expanding population results in an increase of global energy demand. The world energy consumption mainly concerns the use of fossil fuels followed by hydro and nuclear energy; the remaining part belongs to the renewable energies sources. The develop of alternatives for the generation of sustainable energy is an important research field which attracts much attention, since the fossil fuels are an energy sources that will exhaust in the coming decades 1. An important process is the conversion of solar energy into chemical ones 2 as happens in the natural photosynthetic process. Different research focused their works on the optimization of artificial system that reflects the photosynthesis in which the aim is to harmless the sunlight energy in combination with a catalytic system to conduct the photocatalytic water splitting in order to form oxygen and hydrogen 3. The research work developed in the Professor S. Rau’s research group, at University of Ulm, focused on photocatalysis targeted to the production of hydrogen using different photocatalysts in two different assembly: intramolecular and intermolecular systems. The study was divided in two parts, the aim of the first one is to find a new synthetic pathway, in order to obtain a pure intramolecular photocatalyst [(tbbpy)2Ru(tpphz)PtI2](PF6)2 for the photocatalytic hydrogen production. This photocatalyst was already synthetized in a not pure form in Rau’s research group by Dr. Pfeffer 4. The second parts compared the functioning in term of hydrogen catalytic efficiency of two intermolecular photocatalysts constituted by different ruthenium complexes as [(tbbpy)2Ru(tpphz)]( PF6)2 and [Ru(tbbpy)3](PF6)2 with the same catalytic centre represented by [(tbbpy)PtI2] compound. References: 1) Z. Yang, J. Zhang, M. C. W. Kintner-Meyer, X. Lu, D. Choi, J. P. Lemmon, J. Liu, Chem. Rev. 2011, 111, 3577–3613. 2) G. W. Crabtree and N. S. Lewis, Phys. Today, 2007, 60, 37–42. 3) J. H. Alstrum-Acevedo, M. K. Brennaman and T. J. Meyer, Inorganic Chemistry, 2005, 44, 20. 4)] M. G. Pfeffer, T. Kowacs, M. Wächtler, J. Guthmuller, B. Dietzek, J. G. Vos, S. Rau, Angew. Chem. Int. Ed. 2015, 54, 6627 –6631
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/11581/391699
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