Zinc-assisted synthesis of Fe-N-C catalysts based on polyaniline with high oxygen reduction reaction catalytic activities in direct methanol fuel cells

Pub Date : 2022-12-04 DOI:10.1002/fuce.202200118

Xuelin Zhang PhD, Chenjun Hou, Weijian Yuan PhD, Chengwei Deng PhD, Feng Ji, Li Tian PhD, Guochang Lin PhD, Huichao Deng, Yufeng Zhang

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引用次数: 1

Abstract

Fe-N-C catalysts show great potential to replace Pt/C in oxygen reduction reaction (ORR). Polyaniline (PANI) is an ideal precursor with an abundant and homogeneous distribution of nitrogen sources. However, Fe-N-C based on PANI suffers from an unsatisfied performance in acidic media. Herein, a facile zinc-assisted synthesis of Fe-N-C based on PANI was reported in this paper. ZnCl₂ templates can be removed completely in the pyrolysis procedure, creating abundant porous structures to accelerate the mass transfer and boost ORR performance. Fe-N-C-2 with the adequate and optimizing amount of zinc shows an excellent ORR performance (E_1/2 = 0.91 V in alkaline and E_1/2 = 0.825 V in acidic media) compared with Pt/C (E_1/2 = 0.89 V in alkaline and E_1/2 = 0.84 V in acidic media). Furthermore, a high power density and a long-term operation within 6 h of direct methanol fuel cell based on brilliant Fe-N-C-2 verify a great promising application of potable power devices in the future.

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锌辅助合成基于聚苯胺的Fe‐N‐C催化剂在直接甲醇燃料电池中具有高氧还原反应催化活性

Fe‐N‐C催化剂在氧还原反应（ORR）中显示出取代Pt/C的巨大潜力。聚苯胺（PANI）是一种氮源丰富、分布均匀的理想前驱体。然而，基于PANI的Fe‐N‐C在酸性介质中的性能不令人满意。本文报道了一种基于PANI的锌辅助合成Fe‐N‐C的方法。ZnCl2模板可以在热解过程中完全去除，产生丰富的多孔结构，以加速传质并提高ORR性能。与Pt/C（在碱性介质中E1/2=0.89 V，在酸性介质中E1/2=0.84 V）相比，具有充足且最佳锌量的Fe‐N‐C‐2表现出优异的ORR性能（在碱性中E1/2=0.91 V，在酸介质中E1/22=0.825 V）。此外，基于出色的Fe‐N‐C‐2的直接甲醇燃料电池的高功率密度和6小时内的长期运行验证了饮用电力设备在未来的巨大应用前景。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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