Boosting the Performance of Iron-Phthalocyanine as Cathode Electrocatalyst for Alkaline Polymer Fuel Cells Through Edge-Closed Conjugation,ACS Applied Materials & Interfaces

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Boosting the Performance of Iron-Phthalocyanine as Cathode Electrocatalyst for Alkaline Polymer Fuel Cells Through Edge-Closed Conjugation
ACS Applied Materials & Interfaces ( IF 8.3 ) Pub Date : 2018-08-06 00:00:00 , DOI: 10.1021/acsami.8b09074
Heyou Zhang _{1,

2} , Shiming Zhang _{1,

3,

4} , Ying Wang ₁ , Jiaojiao Si ₁ , Yongting Chen ₁ , Lin Zhuang ₁ , Shengli Chen ₁

Affiliation

Recent progress in anion-exchange membranes has evoked increasing interests in alkaline polymer fuel cells (APFCs). A large body of recent research has demonstrated attractive activity of Fe–N macrocycle complexes as electrocatalysts for the oxygen reduction reaction (ORR) in alkaline media. To be a substitute for Pt in APFCs, however, most of the macrocycle molecules remain largely unsatisfactory in both of the catalytic activity and durability. Herein, we show that a one-pot microwave conjugation results in a polymerized iron-phthalocyanine (pFePc) which exhibits extremely high ORR performance, showing activity much better than that of the FePc monomer and 20 wt % Pt/C, and similar to that of the 60 wt % Pt/C under the same catalyst loading. Furthermore, we proposed an edge-closing strategy to significantly enhance the stability of the pFePc catalyst in alkaline media by eliminating the edge anhydride groups. Using the edge-closed pFePc as the cathode catalyst in APFC, a power density as high as 452 mW·cm^–2 is achieved, which is among the best performance of non-noble metal catalyst-based APFCs so far reported.

中文翻译：

通过闭边共轭提高铁酞菁作为碱性聚合物燃料电池的阴极电催化剂的性能

阴离子交换膜的最新进展引起了人们对碱性聚合物燃料电池（APFC）的关注。最近的大量研究表明，Fe-N大环配合物作为碱性介质中氧还原反应（ORR）的电催化剂具有吸引力。但是，要替代APFC中的Pt，大多数大环分子在催化活性和耐久性方面都仍然不尽人意。在这里，我们表明一锅微波共轭导致聚合的铁-酞菁（pFePc）表现出极高的ORR性能，其活性远优于FePc单体和20 wt％的Pt / C，并且与之相似。在相同的催化剂载量下，Pt / C的重量百分比为60％。此外，我们提出了一种边缘闭合策略，通过消除边缘酸酐基团来显着提高pFePc催化剂在碱性介质中的稳定性。使用边缘封闭的pFePc作为APFC中的阴极催化剂，功率密度高达452 mW·cm达到^–2，这是迄今为止报道的基于非贵金属催化剂的APFC的最佳性能之一。

更新日期：2018-08-06

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