催化作用
降级(电信)
质子交换膜燃料电池
阴极
化学工程
化学
铂金
微型多孔材料
燃料电池
材料科学
环境科学
生化工程
纳米技术
计算机科学
工程类
有机化学
物理化学
电信
作者
Xin Wan,Xiaofang Liu,Jianglan Shui
标识
DOI:10.1016/j.pnsc.2020.08.010
摘要
While Platinum group metals (PGM) free catalysts are promising alternatives to expensive Pt as the cathode catalyst in proton exchange membrane fuel cells, their rapid degradation must be addressed for the commercial feasibility. This review provides a historical survey of the possible degradation mechanisms of PGM-free catalysts. Decades of extensive studies confirm that carbon oxidation and demetalation are primarily responsible for the instability, whereas the mechanisms of protonation and micropore flooding are strongly criticized. Based on the mechanism understanding, the mitigation strategies for improving stability are discussed in detail. Finally, some directions to achieve high-performance and durable PGM-free catalysts are proposed.
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