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Nombre de programmes trouvés : 2374

le (23m56s)

Alejandro Anson-Casaos - Photoelectrochemical characterization of C/TiO2 and C/ZnO nanomaterials in aqueous electrolyte

Carbon nanostructures, including single-walled carbon nanotubes, reduced graphene oxide, and carbon dots, are inserted in TiO2 and ZnO photoanodes with the aim of improving their activity. For the electrode assembly, TiO2 or ZnO nanoparticles, as well as carbon nanomaterials, are dispersed in a liquid and deposited on FTO by spray coating. Various mixed and layer-by-layer electrode configurations are considered. As-prepared electrodes are evaluated by photoelectrochemical (PEC) techniques, mostly cyclic voltammetry and transient photocurrent measurements.   The insertion of the carbon component improves the photocurrent response depending on the measurement conditions, ...
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le (35m2s)

Ally Aukaloo - From molecular to nanostructured materials for artificial photosynthesis

Inspired by chemical subtleties at the active sites of enzymes dealing with the CO2 management in our biosphere, we will discuss on how hydrogen bonding and electrostatic effects may thrive the catalytic power molecular catalysts.[1] Photosystem II is the only enzyme that can capture sunlight to extract electrons and protons from water that are expelled in the form of reduced quinones. We have developed nanostructured conjugated polymers that can act as photocatalysts to replicate the functions of Photosystem II.[2]   [1] P. Gotico ...
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le (38m38s)

Pascal Brault - Reactive molecular dynamics simulations of H2 production and conversion

Since H2 production and conversion efficiencies can be improved and monitored at the molecular scale, reactive molecular dynamics simulations (rMDS) are expected to be of great promise for understanding associated basic mechanisms. Basically, rMDS is a technique aiming at solving full trajectories of a set of atoms, molecules, nanoparticles, with the only ingredient of force fields driving interactions between relevant species.   Due to the recent growth of improved and reactive force fields such as ReaxFF and COMB3 families, it become possible to address complicated reactive process such as H2 ...
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