Fig. 5: Electrochemical performance.

a Linear sweep voltammetry curves of LaAlO₃ anode compared to FTO/glass substrate in the electrolyte of 2 M KHCO₃ (pH 8.3) and 4 M K₂CO₃/KHCO₃ (pH 11). All curves are 95 % iR-compensated. b The calculated H₂O₂ current density and selectivity of LaAlO₃ anode as a function of potential in different electrolytes, and c the generated H₂O₂ amount, selectivity, and stability of the LaAlO₃ anode at different potentials, 2.7 and 3.2 V vs. RHE for 3 h. d Comparison of Faradaic efficiencies at different potentials and onset potentials to reach 2 mA cm⁻² with the previously reported materials in pH 11. e Selectivity vs. activity plot for different metal oxides in the electrolyte of 4 M K₂CO₃/KHCO₃ (pH 11) at 3.2 V vs. RHE. f Comprehensive plot for selectivity and stability in the electrolyte of 4 M K₂CO₃/KHCO₃ (pH 11) at 3.2 V vs. RHE. The x-axis is the FE at time t = 10 min. The y-axis is the FE at time t = 1 h. The diagonal dashed line is the expected response for a stable catalyst.