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Hydrogen is presented by some industrialists and managers as a potential pillar of the ecological transition, particularly in the context of transport (hydrogen-powered cars, hydrogen-powered trains, hydrogen-powered airplanes, etc.), the storage of energy from intermittent renewable sources or in industry (steel and chemical industries). Using hydrogen to decarbonize the economy only makes sense if it is produced in a decarbonized way. In this context, this talk will focus on hydrogen production from renewable sources, solar and water. The performance (absorption of light, creation of photo-charges, their migration and their reactivity with water) of the photoelectrodes depend strongly on the chemistry, structure and microstructure of the materials used. All these physical-chemical parameters can be trigger through a judicious control of processing parameters. This talk will focus primarily on three different processing approaches based on solution chemistry for synthesizing efficient and durable photo-electrodes (Mo-BiVO4, TiO2 and CuO/Cu2O). The performance of the photoelectrodes will be discussed as function of structure, microstructure (porosity, particle size, thickness) and hetero-structure. More importantly, for comparing the performance of the three TiO2 polymorphs, a judicious photoelectrodes? manufacturing is developed in order to solely measure the impact of the structure keeping all the other parameters (porosity, thickness and particle size) constant.  

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• Chimie et sciences connexes (540)

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