The Sabatier principle (volcano plot) bridges electrochemistry and materials science: optimal catalysts bind reaction intermediates with intermediate strength, and DFT computes binding energies from electronic structure to guide catalyst design.

The Sabatier principle states that the optimal catalyst for a reaction binds intermediates neither too strongly (reactants cannot desorb → catalyst poisoned) nor too weakly (reactants cannot adsorb → no reaction). Plotting catalytic activity against binding energy gives a "volcano plot" with optimal catalysts near the peak. For water splitting (breakthrough gap bg-hydrogen-water-splitting), the oxygen evolution reaction (OER) overpotential is determined by the binding energies of OH*, O*, and OOH* intermediates on the catalyst surface. Nørskov et al. (2004) showed that for a universal OER scaling relation ΔG_OOH* − ΔG_OH* ≈ 3.2 eV (a thermodynamic constraint), the theoretical minimum overpotential is approximately 0.4 V — a hard lower bound set by intermediate scaling relations. The bridge: materials electronic structure (band filling, d-band center, coordination number) → reaction intermediate binding energies → catalytic activity. Density functional theory (DFT) computes binding energies from first principles, enabling materials screening. The "materials genome" vision — predict catalytic activity from crystal structure before synthesis — is this bridge in operation.

Surface science and electrochemistry overlap but differ in experimental conditions (ultra-high vacuum vs. aqueous electrolyte), making it difficult to directly compare surface-science binding energies with electrochemical overpotentials. The computational bridge (DFT + implicit solvation + electrode potential correction) spans this gap but is not universally applied by experimentalists.