1：Experimental Design and Method Selection:

A one-pot strategy was used to fabricate Au-PEDOT nanonet catalysts by polymerizing EDOT with Au(III) ions as oxidant, followed by reduction with NaBH4. Electrochemical measurements (CV, CA, EIS) were conducted to evaluate catalytic activity.

2：Electrochemical measurements (CV, CA, EIS) were conducted to evaluate catalytic activity. Sample Selection and Data Sources:

2. Sample Selection and Data Sources: Carbon cloth (CC) was used as electrode substrate. Au-PEDOT, PEDOT, and Au catalysts were synthesized and compared. Data from electrochemical tests in 1.0 M KOH with 1.0 M ethanol or 2-propanol.

3：0 M KOH with 0 M ethanol or 2-propanol. List of Experimental Equipment and Materials:

3. List of Experimental Equipment and Materials: Conductive carbon cloth (CC, WOS 1002 CeTech CO., Ltd.), HAuCl4·3H2O (Sinopharm), EDOT (Bayer), Nafion-117 (Sigma-Aldrich), ethanol, 2-propanol, NaBH4, H2SO4, FeCl3, KOH (Sinopharm), doubly distilled water.

4：Experimental Procedures and Operational Workflow:

EDOT dissolved in ethanol, mixed with HAuCl4, stirred for 10 h, reduced with NaBH4, centrifuged, rinsed, dispersed with Nafion, loaded onto CC, dried at 60°C. Electrochemical tests performed with CHI 760E potentiostat in three-electrode cell.

5：Data Analysis Methods:

ECSA calculated from CV reduction peaks, peak currents and potentials from CVs, durability from multiple cycles, impedance from EIS.