基于聚苯胺的富N-掺杂石墨烯的多孔纳米复合结构调控及其氧还原反应

The proton exchange membrane fuel cell confronts the urgent improvement on cathodic activity, stability, as well as the catalyst cost. This application planned to prepare PtxFe(1-x) –PANI/Graphene (polyaniline/Graphene) composite structure with In Situ manner, while achieved controlled adjustment for degree of PANI polymerization. Subsequently, the heat-treatment process increased the NG (nitrogen doped graphene) originated from PANI, leading to joint contribution of active NG, PtxFe(1-x) NPs. The porous nano-composite structure can be further modified with the Nafion, imidazole-type ionic liquid, enhancing the macro and micro tri-phase behaviors in electrode. Thus, the PtxFe(1-x)-PANI/Graphene structure can increase its activity, stability applications in cathodic oxygen reduction reaction, laying scientific basis further.

质子交换膜燃料电池急需突破阴极催化剂活性、稳定性制约。本申请通过原位制备PtxFe(1-x) –PANI/Graphene（聚苯胺/石墨烯）复合结构，实现对PANI聚合度可控调节；进而采用热处理手段提高PANI衍生NG（氮掺杂石墨烯）结构，以促进活性NG、PtxFe(1-x) NPs的共同贡献。通过Nafion、咪唑类离子液体调控多孔纳米复合结构，改进电极的宏观、微观三相界面行为，从而为PtxFe(1-x)-PANI/Graphen结构在电池阴极氧还原反应的中的活性、稳定性应用，垫定科学基础。

本项目研发的20%Pt-PANI/CNT、40%Pt-PANI/CNT催化剂，已达到商业催化剂Johnson-Matthey 40%Pt/C的技术水平，新型组装的40%Pt-PANI/CNT催化剂，具有更为优良的活性及抗衰减性，发展前景广阔；发展了常温、高温制备PtFe合金催化剂路线，指明了催化剂拓展、降低成本方向；初步打开离子型液体在催化剂的添加应用，促使了传质-材料一体化解决；发展了交流阻抗在电池测量的核心地位，奠定了国家重点项目攻关基础。