How one-photon can induce water splitting into hydrogen peroxide and hydrogen by aluminum porphyrins. Rationale of the thermodynamics

The thermodynamic correlation between the input energy by the one-photon excitation of aluminum porphyrin species (E₀₀= 2.03 eV) and output energy for the splitting of two water molecules into H₂O₂and H₂(2H₂O → H₂O₂+ H₂, ΔG= (3.54 eV)).