石墨烯/金属氮杂环纳米复合材料在燃料电池分子氧催化还原反应中的应用研究

Catalytic Activity of Graphene/Metalmacrocycle Nanocomposites for Oxygen Reduction Reaction in Fuel Cells

石墨烯具有良好的电子传导性、巨大的表面积、稳定的化学和机械稳定性等,在分子氧催化还原(ORR)反应中可以有效地改进催化剂的催化活性,是过渡金属大环催化剂新的基底材料。对石墨烯支持的非贵金属氮杂环复合材料在ORR催化反应中的应用以及影响催化O_2活性的因素进行了讨论。重点讨论了卟啉和酞菁中心金属核,Co和Fe,以及卟啉和酞菁作为N的前驱体对ORR电催化活性的影响,并展望了非贵金属氧还原催化剂在燃料电池中的研究发展方向。

Graphene acts as a new class of support material for metal catalysts owing to its excellent electrical conductivity, large surface area, chemical and mechanical stability, eventually increasing the stability and improving the electrocatalytic activities in ORR reactions. Important advances involving such metal-containing macrocycles with carbon-based composite structures in ORR enhancement are reviewed and the influence of the core metal, Co and Fe precursors containing nitrogen, porphyrin and phthalocyanine on the electrocatalytic activities towards ORR are mainly discussed. Future research strategies are also briefly discussed.