传统无机氧化物及其负载金属催化剂在催化选择性氧化降解木质素中存在催化条件苛刻、木质素降解效率低、目标产物选择性差等问题，其主要原因还是催化剂活性低，因此，迫切需要发展新型高活性催化剂。本项目以催化活性容易调节的氮掺杂碳负载非贵金属为催化剂，以木质素及其模型化合物为反应物，研究分子氧作用下催化氧化木质素制备高附加值芳香化合物的反应。研究合成材料方法对催化剂结构、性能和稳定性影响；提出通过调节氮掺杂碳和金属纳米粒子间电子转移产生精准可控的活性氧物种协同反应中质子转移达到高效高选择性催化氧化降解木质素的新思想；探讨活性氧物种与底物分子结合方式及其对底物分子化学键的活化、断裂和重组生成催化产物的过程；探索木质素及其模型化合物的转化新途径，研究相关反应路径；揭示氮掺杂碳负载非贵金属催化剂在木质素转化过程中C-C键和C-O键断裂规律。本项目的研究，为木质素高效转化为高附加值化学品提供新思路和科学基础。

Traditional inorganic oxide and metals supported on inorganic oxide used in selective catalytic oxidation degradation of lignin has some problems such as harsh reaction conditions, low degradation efficiency of lignin, low target product selectivity and so on. The main reason is the low catalyst activity. Therefore, it is very urgent to develop novel and highly active catalysts. This project intends to use non-noble metals supported on nitrogen-doped carbon as catalysts, lignin and its model compounds as reactants, to study the catalytic conversion of lignin to prepare high value-added aromatic compounds. The activity and stability of catalysts will be correlated with their synthesis procedure and structure. The new idea of precise and controllable active oxygen species generated by adjusting electron transfer between nitrogen-doped carbon and metal nanoparticles synergized with corresponding proton transfer to achieve efficient selective catalytic oxidation degradation of lignin will be put forward. The combination way of active oxygen species and substrate molecule will be discussed. The procedure of active oxygen species for the activation, cleavage and recombination of substrate molecule chemical bond will also be studied. New ways of transformation of the lignin and its model compounds will be explored. The related reaction path will also be studied. The rules of cleavage of the C-C bond and C-O bond catalyzed by metal nanoparticles supported on nitrogen-doped carbon in the process of catalytic conversion of lignin will be revealed. This project will provide new ideas and scientific basis for the highly efficient conversion of lignin into high value-added chemicals.