关键词: 质子交换膜燃料电池, 铂催化剂, 载体, 电化学性能, 稳定策略

Abstract: The low service lifetime of proton exchange membrane fuel cells (PEMFCs) is the main bottleneck for their commercial applications. One of the main factors is that the expensive metal Pt catalyst is easy to degradation under the harsh working environment of PEMFC (such as variable voltage, strong acidity, gas-liquid two-phase flow), which leads to the inevitable decay of the catalytic performance, thus, seriously restricting the lifetime of PEMFC. Therefore, the electrochemical stability of Pt-based electrocatalysts has become an important and hot topic to improve the PEMFC lifetime. In this paper, we review the recent development in enhancing the stability of Pt electrocatalysts for PEMFC, mainly focusing on the achievements obtained by our group, especially, the polymer stabilization strategy, carbon encapsulation/confinement stabilization strategy, and support stabilization strategy. In addition, the challenges in these Pt catalyst stabilization strategies are summarized, and the corresponding measures and future research trends in facing these challenges are suggested.

Key words: proton exchange membrane fuel cell, Pt catalyst, support, electrochemical performance, stability strategy