Abstract
We present a simple kinetic model for cyclic water cleavage by a system containing an aqueous solution of a sensitizer, an electron acceptor and two specific catalysts. We illustrate quantitatively how the hydrogen production rate is affected by various parameters such as the concentrations of the solutes, the pH of the solution, the partial pressure of oxygen and hydrogen, the efficiencies of the catalysts, the irradiation intensity and the redox potential of the acceptor. The maximum achievable Φ H 2 is calculated for various operating conditions.
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