过渡金属氮化物的电催化特性类似于贵金属，对非贵金属燃料电池的发展起着至关重要的作用；由于耦合作用，石墨烯有望对纳米结构催化剂的性能有显著增强。本项目以过渡金属氮化物与石墨烯为研究对象，把气相沉积、溶液法与电沉积相结合，实现氮化物纳米线/石墨烯微片杂化结构的三维微阵列的可控生长，探索合成条件、生长机理与杂化结构的关系；揭示不同生长条件下，纳米线与石墨烯的结构与耦合对杂化物电催化特性和动力学的影响及其内在关联。制作以氮化物纳米线/石墨烯微片为电极材料的质子交换膜燃料电池单电池装置，测试包括电压-电流密度，功率-电流密度，电池寿命以及操作条件对电池动态响应的影响，并对比于真实电池理论模型，揭示金属氮化物纳米线/石墨烯杂化结构作为电池电极材料的实际应用价值。本项目期望为金属氮化物纳米线/石墨烯杂化结构在新型非贵金属燃料电池中的应用奠定理论和实验基础。

Transition metal nitrides have attracted great attention in developing non-precious metal fuel cells due to their distinct electrocatalysis characteristics which are similar to those of precious metals. Performance of nanoscale catalyst is expected to be drastically enhanced by combining with graphene due to coupling effect. In this project, our goal is to realize the controlled growth of transition metal nitride nanowires/graphene nanoplatelets hybrid arrays based on chemical vapour deposition ，solution and electrodeposition, unveiling the correlation between experimental parameters, growth mechanism and structure of the hybrid. The effect of the hybrid structure and nanowires/graphene coupling effect on the electrocatalysis and reaction kinetics of the electrode will be investigated. Single proton exchange membrane fuel cell system will be assembled making use of the hybrid of transition metal nitride nanowires/graphene nanoplatelets as the electrode materials. Some key performance parameters of the cell will be evaluated including voltage-current density (V-i), power-current density(P-i) and cell life, and the effect of operation conditions on the dynamic responses of the cell will also be investigated as well. The performance parameters of the cell will be evaluated based on the theoretical model of commercial cell to explore the potential of the hybrid in practical applications. The work in this project will not only explore fundamental understandings on the nanostructured transition nitride/graphene hybrid in terms of electrocatalysis, but also promote the development of putting the hybrid into practical applications to replace precious metal catalysts of proton exchange membrane fuel cells.