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Metal-organic frameworks as heterogeneous photocatalysts for CO2 reduction and H2 generation using H2O

18th national competition for scientific and technical research

Renewable energy: materials and processes

Senior Researcher : Sergio Navalón Oltra

Research Centre or Institution : Departamento de Química. Universidad Politécnica de Valencia


Currently, there is a growing interest in the development of sustainable energy sources alternative to the traditional use of fossil fuels. In this context, the main challenge of this project is the use of metal-organic frameworks (MOF) as heterogeneous photocatalysts for the production of solar fuels derived from CO2 and H2O. According to the project schedule, during this third year a series of materials based on UiO-66 (Zr) modified with cerium and/or titanium ions in the metal nodes have been prepared. The results obtained include the use of these materials as efficient photocatalysts to perform the decomposition of water into hydrogen and oxygen using visible light irradiation.

Specifically, the presence of cerium and titanium in the UiO-66 (Zr) material favors the photocatalytic activity of the process, a fact that can be explained by the increase in the lifetime of the charge separation during the photoexcitation of the MOF as evidenced from laser flash photolysis measurements. Furthermore, several UiO-67(Zr) materials containing in their structure a ruthenium complex as organic ligand and titanium or cerium ions in the metal nodes have been prepared. Preliminary photocatalytic experiments using these materials demonstrate the improvement of photocatalytic activity under irradiation with visible light. In addition to the UiO-66/67 materials, titanium MOFs such as MIL-125(Ti) -NH2 have been modified with different co-catalysts. Titanium MOFs containing RuOx nanoparticles have been the most efficient in promoting the CO2 methanation reaction under visible light irradiation.


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Magazine Articles 4
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Communications at international conferences -


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