Fig. 4: Proton-electron transfer mechanisms in POMs-based redox mediators.
From: Tunable multi-electron redox polyoxometalates for decoupled water splitting driven by sunlight
a The pKa values of proton transfer products of {P2W18}, {P2W17V} and {P2W15V3}, and the surface electrostatic potential of the three POMs-based redox pairs (The red area represents regions of high electrostatic potential, the blue area indicates regions of low electrostatic potential, and the green area denotes the transitional region). b-d The electron and proton transfer behaviors investigated via Marcus theory and the related pH changes during the electrolysis of {P2W18}, {P2W17V}, and {P2W15V3} solutions, respectively. The calculation data is provided in Supplementary Data 1.
