Publication date: 15th December 2014
A PhotoFuelCell is a photoelectrochemical cell where an organic substance (the fuel) can be photocatalytically oxidized producing electrical or chemical energy. In recent years, we are studying various aspects of PhotoFuelCells, either as alternative means of solar energy conversion into electricity or as a means to produce renewable hydrogen. We systematically use nanoparticulate titania as photocatalyst and we search for ways to sensitize it in the Visible. There are very few sensitizers of titania that are functional in an aqueous environment. We will present examples and discuss their limitations. In this presentation, emphasis will be given to procedures for photoelectrochemical hydrogen production.
Photocatalysis with dispersed particles is the most efficient procedure for hydrogen production but it relies on the use of noble metal co-catalysts. In a photoelectrochemical cell, the site where hydrogen is generated, i.e. the cathode, is separated from the site where fuel oxidation takes place, i.e. the photoanode. This spatial separation allows for the use of alternative electrocatalysts, either completely absolved of noble metals or using small quantities of them. Novel carbon nanostructures will be among other materials presented for this purpose.
Related references: (1) Production of electricity and hydrogen by photocatalytic degradation of organic wastes in a Photoelectrochemical cell. The concept of the Photo-Fuel-Cell. A review of a re-emerging research field: Panagiotis Lianos, J.Hazardous Materials, 185(2011)575-590 http://dx.doi.org/10.1016/j.jhazmat.2010.10.083 (2) Quantum dot sensitized titania for photo-fuel-cell and for water splitting operation in the presence of sacrificial agents: Maria Antoniadou, Stavroula Sfaelou, Panagiotis Lianos, Chemical Engineering Journal 254(2014)245-251 http://www.sciencedirect.com/science/article/pii/s1385894714006901
Acknowledgement: This project is implemented under the "ARISTEIA" Action of the "OPERATIONAL PROGRAMME EDUCATION AND LIFELONG LEARNING" and is co-funded by the European Social Fund (ESF) and National Resources.
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