Figure 3.

(a) ΔCVs of anode materials by subtracting the CV without HMF from the CV with 5 mM HMF present. (b)–(d) electrolysis results using BDD (b), graphite foil (c) and Cu‐sheet (d) as working electrode vs. Pt in 1 M KOH in a divided cell at 1.6 V vs. RHE after 30, 60, 90 and 120 minutes. Yield and faradaic efficiency towards FDCA (Y (FDCA) and FE (FDCA), respectively) are shown in blue and orange with overall loss (green) and non‐electrochemical losses (blank squares) for comparison reasons. Note, that no additional catalyst was immobilized on the “inert” electrode materials.