A Standardized Dataset of Linear Sweep Voltammetry Curves for the Acidic Oxygen Reduction Reaction on Carbon-Supported Catalysts in Sulfuric Acid Medium

• • The dataset contains 120 validated LSV curves from both non-precious metal (MNC) and platinum-based (Pt-MC) catalysts, enabling direct benchmarking of ORR activity under standardized conditions (O2-saturated 0.5 mol L−1 H2SO4). • • Quality control thresholds are strictly defined: relative standard deviation ≤2% for half-wave potential (E1/2) and ≤5% for limiting current density, ensuring high reproducibility and reliability for comparative analysis. • • All measurements were performed at controlled rotation speeds using a rotating disk electrode, allowing extraction of kinetic and mass transport parameters essential for mechanistic studies and catalyst screening. • • The dataset is openly accessible via Science Data Bank (DOI: 10.57760/sciencedb.j00125.00224), providing a structured resource for machine learning applications in electrocatalysis and facilitating community-wide benchmarking.