Boosting the Performance of Iron-Phthalocyanine as Cathode Electrocatalyst for Alkaline Polymer Fuel Cells Through Edge-Closed Conjugation
Boosting the Performance of Iron-Phthalocyanine as Cathode Electrocatalyst for Alkaline Polymer Fuel Cells Through Edge-Closed Conjugation
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通过闭边共轭提高铁酞菁作为碱性聚合物燃料电池阴极电催化剂的性能
DOI：
10.1021/acsami.8b09074
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发表时间：
2018
影响因子：
9.5
通讯作者：
Chen Shengli
中科院分区：
文献类型：
--
作者：
Zhang Heyou;Zhang Shiming;Wang Ying;Si Jiaojiao;Chen Yongting;Zhuang Lin;Chen Shengli
近年来，阴离子交换膜的研究进展引起了人们对碱性聚合物燃料电池（APFC）的极大兴趣。近年来大量的研究表明，Fe-N大环配合物在碱性介质中具有良好的氧还原电催化活性。然而，作为APFC中Pt的替代物，大多数大环分子在催化活性和耐久性方面仍然很不令人满意。在此，我们表明，一锅微波共轭的结果在聚合的铁酞菁（pFePc），表现出极高的ORR性能，显示出的活性远远优于FePc单体和20重量%的Pt/C，并类似于60重量%的Pt/C在相同的催化剂负载量。此外，我们提出了一种边缘关闭策略，以显着提高在碱性介质中的pFePc催化剂的稳定性，通过消除边缘酸酐基团。采用边缘封闭的pFePc作为APFC的阴极催化剂，获得了高达452 mW·cm-2的功率密度，是目前报道的非贵金属催化剂型APFC中性能最好的。
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–2is achieved, which is among the best performance of non-noble metal catalyst-based APFCs so far reported.