Catalytic Depolymerization of Lignite‐Derived Model Compounds Aryl Ethers to Monomers Over a Metal–Organic Frameworks Derived Catalyst

Abstract An available protocol for catalytic depolymerization (CDP) of lignite‐derived model compounds aryl ethers was established via a MOFs‐derived Ni, Co bimetallic N‐doped porous carbon nanocomposite (Ni‐Co/NC). Structural characterization reveals that the Ni‐Co/NC nanoparticles possess a uniform dispersion, optimized surface properties, and enhanced active site density. Ni‐Co/NC exhibits excellent catalytic performance and stability toward the depolymerization of (benzyloxy)benzene (BOB) to monomeric compounds, at 165 °C in n ‐hexane solvent, under 2 MPa initial hydrogen pressure for 2 h. The results show that Ni‐Co/NC effectively promotes the generation and transfer of diatomic active hydrogen and hydrogen radicals, ultimately catalyzing the depolymerization of BOB to obtain monomers. The CDP includes the cleavage of C–O bridged bonds and the subsequent hydrogenation of the resulting toluene and phenol. Furthermore, Ni‐Co/NC is versatile for other lignite‐derived aryl ethers and guaiacol, obtaining their corresponding monomer cyclohexanol in good selectivities. After the reaction, Ni‐Co/NC is stable and its catalytic activity is adequately maintained even after 8 cycles. This protocol is anticipated to offer a promising strategy for developing high‐performance bimetallic nanomaterials derived from MOFs, thereby facilitating their potential industrial implementation.