Ni-Mo-C三元体系的可控制备及其组分构成在催化加氢脱氧反应中的作用研究

In order to improve the deep hydrogenating capability and the stability of molybdenum carbide in biomass hydrodeoxygenation, Ni the second metal which features excellent hydrogenation activity is to be incorporated to establish a Ni-Mo-C ternary multi-component system. There are monometallic carbide, bimetallic carbide, metal, and alloy components in the Ni-Mo-C ternary system, each of which plays a particular role in catalytic reactions, thus the design of the component composition of the Ni-Mo-C ternary system can be used to tune its catalytic performance. This research intends to study the influences of the Ni/Mo ratio, the heating rate, and the atmosphere, the temperature, the duration time of the thermal decomposition process of the Ni-Mo-C single-source precursor on the thermal decomposition products using qualitative and quantitative phase analysis, in order to characterize the phase evolution and finally, to realize the control synthesis and the quantitative description of the Ni-Mo-C ternary system. The relation between the component composition and the catalytic performance of the Ni-Mo-C ternary system is to be investigated using guaiacol hydrodeoxygenation as a probe reaction, which will provide important guidance on the component composition optimization of the Ni-Mo-C ternary system to promote its stability and deep hydrogenating capability in hydrodeoxygenation.

为了改善碳化钼在生物质加氢脱氧中普遍存在的深度加氢能力不足和稳定性差问题，本项目设计向其中引入加氢活性优异的第二金属Ni，形成Ni-Mo-C三元多组分体系。该体系中存在单金属碳化物、双金属碳化物、金属、合金等催化功能各有侧重的组分，可以通过设计组分构成定向调变体系的催化性能。本项目拟采用单源前体制备路线，基于对Ni-Mo-C前驱体热解产物的定性和定量分析，探讨Ni/Mo比、升温速率、热解气氛、温度及时间等参数对热解产物的影响，阐明物相变化规律，实现对Ni-Mo-C三元体系组分构成的调控及定量描述；以愈创木酚加氢脱氧为探针反应，研究Ni-Mo-C三元体系的组分构成与催化性能之间的构效关系，为提升体系在加氢脱氧反应中的深度加氢能力及稳定性进行组分结构优化提供依据。

为了改善碳化钼在生物质加氢脱氧中普遍存在的深度加氢能力不足和稳定性差问题，本项目设计向其中引入加氢活性优异的第二金属Ni，形成Ni-Mo-C三元多组分体系。该体系中存在单金属碳化物、双金属碳化物、金属、合金等催化功能各有侧重的组分，可以通过设计组分构成定向调变体系的催化性能。本项目采用单源前体制备路线，基于对Ni-Mo-C前驱体热解产物的定性和定量分析，探讨了Ni/Mo比、温度及时间等参数对热解产物的影响，阐明物相变化规律，实现对Ni-Mo-C三元体系组分构成的调控及定量描述；以苯乙醚加氢脱氧为探针反应，研究Ni-Mo-C三元体系的组分构成与催化性能之间的构效关系，为提升体系在加氢脱氧反应中的深度加氢能力及稳定性进行组分结构优化提供依据。