fig2

From: Selective ROS-mediated oxidative depolymerization of lignin to guaiacyl monomers over a mesoporous Cu₂Fe₁/JN catalyst

Selective ROS-mediated oxidative depolymerization of lignin to guaiacyl monomers over a mesoporous Cu<sub>2</sub>Fe<sub>1</sub>/JN catalyst

Figure 2. Catalytic performance of Cu₂Fe₁/JN for the oxidative depolymerization of calcium lignosulfonate. (A) Comparison of the catalytic performance of the blank and Cu-Fe catalysts supported on different supports for the oxidative depolymerization of calcium lignosulfonate; (B) Comparison of lignin oxidative depolymerization performance with previously reported catalysts (data from Supplementary Table 6); (C-G) Effect of Cu/Fe ratios, temperature, time, NaOH concentration, and O₂ pressure on calcium lignosulfonate depolymerization; (H) Reusability of Cu₂Fe₁/JN. Reaction conditions: 2.5 g calcium lignosulfonate, 0.25 g Cu₂Fe₁/JN, NaOH solution (50 mL, 1.25 M), 0.4 MPa O₂, 150 °C, 5 h. Data are reported as mean ± standard deviation (N = 3).