• • Maximum Faradaic efficiency (FE) of 98.1% for acetate at 100 mA cm−2, demonstrating that high selectivity is maintained under industrially relevant current densities, a critical threshold for economic viability.
• • Peak partial current density of 291.2 mA cm−2 for ethanol oxidation, exceeding typical spinel oxide catalysts (<50 mA cm−2) by nearly sixfold, enabling compact electrolyzer design and reduced capital expenditure.
• • Stability over 100 h without significant degradation, addressing the durability bottleneck that plagues most transition metal-based catalysts and supporting continuous industrial operation.
• • In-situ ATR-SEIRAS evidence that Pt and Ag co-modification moderates *OH generation and inhibits *OH to *O conversion, directly linking surface water dissociation kinetics to improved selectivity and providing a design principle for future catalysts.