Can ultraviolet light (over a wavelength range from 200 to 400 nm) be applied to operate the photodissociation of water using a titanium dioxide (TiO2) photoanode? Explain your answer. (b) On-board hydrogen storage seriously prohibits the utilization of fuel cell cars. What are the main problems of the on-board fuel storage the users may encounter? (c) Please briefly describe the hydrogen storage mechanism of chemical hydrides.

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Electrolysis

Electrolysis is defined as the process of breaking down ionic compounds into their constituent elements by passing a direct electric current through the compound in a fluid state. The cathode reduces cations, while the anode oxidizes anions. An electrolyte, electrodes, and some form of external power source are the main components required for conducting electrolysis. A partition, such as an ion-exchange membrane or a salt bridge, may also be used, but this is optional. These are primarily used to prevent the products from diffusing near the opposing electrode.