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Hydrogen, energy conversion cathode

The common photoelectrochemical cell for the conversion of solar energy to the chemical energy of hydrogen consists of a semiconductor photoanode and a metal cathode immersed in the solution of electrolyte. Oxygen is released at the photoanode and hydrogen - at the cathode under illumination of the photoanode by sunlight. In our work it is first proposed to... [Pg.193]

The reactive semiconductor-electrolyte interface makes stability a major issue in photoelectrochemical solar energy conversion devices, and aspects of thermodynamic and kinetic stability are briefly reviewed here. Thermodynamic stability considerations are based on so-called decomposition levels [56, 57] that are determined by combining the decomposition reaction with the redox reaction of the reversible hydrogen reference electrode. The anodic and cathodic decomposition reactions of a compound semiconductor MX can be written for aqueous solutions as... [Pg.72]

Hydrogen electrode reactions, that is hydrogen oxidation reaction (HOR) and hydrogen evolution reaction (HER) present one of the most important gas electrode reactions. When concerned with energy conversion applications HOR is particularly important as it presents anode reaction in proton fuel cells, while HER is cathode reaction in the case of water electrolysis. With overall reaction being ... [Pg.31]

On this basis KU is already in a position to determine with its clients the profitability of a conversion of an existing plant to GDE cathodes or the equipment of new plants with such cathodes, taking into consideration the price of electric energy, the cost of industrial oxygen and a compensation for the absent hydrogen. Figure 16.15 illustrates aspects such as re-membraning combined with the installation of a new... [Pg.221]

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See also in sourсe #XX -- [ Pg.607 ]



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