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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 1. Morphology and surface chemical property analysis of Cu₂Fe₁/JN. (A and B) SEM images; (C and D) TEM images; (E) Corresponding energy-dispersive X-ray spectroscopy (EDS) elemental mapping of the overlapped image and Cu, Fe, Si, and O elements; (F) Nitrogen adsorption-desorption isotherm and the corresponding pore size distributions (inset); (G) XRD pattern; (H-J) High-resolution XPS spectra of Cu 2p, Fe 2p, and O 1s; (K) H₂-TPR profiles. SEM: Scanning electron microscopy; TEM: transmission electron microscopy; XRD: X-ray diffraction; XPS: X-ray photoelectron spectroscopy; H₂-TPR: H₂ temperature-programmed reduction.