Data from: Direct propylene epoxidation via water activation over Pd-Pt electrocatalysts

<p>Direct electrochemical propylene epoxidation using water oxidation intermediates presents a sustainable alternative to existing routes that involve hazardous chlorine or peroxide reagents. Here we report an oxidized palladium-platinum alloy catalyst (PdPtO_x/C), which reaches a Faradaic efficiency of 66±5% toward propylene epoxidation at 50 mA/cm² at ambient temperature and pressure. Embedding platinum into the palladium oxide crystal structure stabilized oxidized platinum species, resulting in improved catalyst performance. The reaction kinetics suggest that epoxidation on PdPtO_x/C proceeds through electrophilic attack by metal-bound peroxo (OO*) intermediates. This work demonstrates an effective strategy for selective electrochemical oxygen-atom transfer from water, without mediators, for diverse oxygenation reactions.</p>