Hydrogen is a new energy source with great potential for application. Researchers at the University of Spain's Jaime I University Photovoltaic and Photovoltaic Equipment Group have developed an organic device that uses only sunlight to produce hydrogen. The organic materials used in these devices are less expensive, more efficient, and more flexible than existing inorganic materials, but their stability is problematic when in contact with aqueous media. A study published in the journal Physical Chemistry mentions that these devices have achieved excellent stability, which indicates an important step in obtaining solar fuel from organic materials.
Sixto Giménez, a collaborator of the study, pointed out that "hydrogen production can be completed in three hours, and it is still too early to confirm the stability of organic materials."
Organic photovoltaic devices are susceptible to corrosion in water and are easily damaged. “Our strategy is to install a physical barrier between the PV module and the catalyst that promotes the hydrogen generation reaction. To achieve this, we have made a dense layer of nano-titanium dioxide material, not only as a barrier between water and PV modules, but also To the electrical connection between the photovoltaic components and the platinum catalyst. With this approach, we can greatly improve the stability of these devices while maintaining their performance," said Antonio Guerrero Researcher.
Getting solar fuels like hydrogen from water and sunlight is a strategy for solving global energy problems. “We have access to renewable energy, just like high-energy fuels such as hydrogen from sunlight and water. In addition, hydrogen is widely used as a compound in industries such as fertilizers or synthetic hydrogen compounds,†Giménez noted.
The research under the PHOCS (Photocatalytic Hydrogen Production by Organic Catalytic System) program has been funded by the EU's Seventh Framework Programme to develop a new device based on organic semiconductor materials that enables photolysis of water. Efficiently produce hydrogen. This research seeks the best way to produce hydrogen using low cost and more stable materials.
The project, which is about to be completed in November, has a big challenge to prove that organic materials (plastics) can be used in photoelectrochemical methods to produce hydrogen. This goal has been achieved. Giménez explains, “The high-energy fuel of hydrogen can be used as gasoline, which can be converted into electricity and mechanical energy.†These solar fuels “will allow you to go to the gas station in the near future without having to fill up the gasoline. It is filled with hydrogen, which converts energy into electricity through a fuel cell and then converts it into mechanical energy. In this process, water is the only waste.†Therefore, this research project helps to reduce the energy consumption of existing fossil-dependent energy sources. The model translates into a sustainable model that respects the environment using solar energy.
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