质子交换膜燃料电池Pt基氧还原电催化剂性能提高的策略

Strategies in improving the performance of Pt-based oxygen reduction electrocatalysts for proton exchange membrane fuel cells

铂(Pt)的价格高、储量低,开发优异的Pt基氧还原电催化剂对提高质子交换膜燃料电池(PEMFCs)性能和推动其应用具有十分重要的意义。介绍了Pt基电催化剂活性提高的主要理论,综述了当前电催化剂性能提高的策略,包括电催化剂颗粒尺寸、暴露晶面、晶相和界面对其活性和稳定性的影响,对Pt基电催化剂的发展前景和面临的挑战进行了展望和讨论。

The design of excellent platinum(Pt)-based oxygen reduction electrocatalysts is of great significance for improving the performance of proton exchange membrane fuel cells(PEMFCs)and promoting their applications due to high price and low reserves of Pt.In this review,the activity improvement mechanism of Pt-based electrocatalysts is introduced.Furthermore,the current electrocatalyst activity improvement strategies are summarized,including the influence of electrocatalyst particle size,exposed crystal facet,crystal phase and interface on its activity and stability.Finally,the future development prospects and challenges of Pt-based electrocatalysts are discussed.