▎ 摘　　要

NOVELTY - A lignin depolymerization catalyst comprises metal oxides, and graphene oxide on which the metal oxide is supported and doped with nitrogen and metal particles. USE - Lignin depolymerization catalyst used for producing lignin-derived bio-oil (claimed) for chemical and liquid fuel products. ADVANTAGE - The lignin depolymerization provides lignin-derived bio-oil with excellent selectivity and yield, by simple, efficient and economical method. The lignin-derived bio-oil has high alkylphenol content and conversion rate. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for method for producing lignin-derived bio-oil, which involves preparing lignin depolymerization catalyst, and depolymerizing lignin in the presence of hydrogen source at 200-400 degrees C for 30-180 minutes.