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

IF 2.6 4区工程技术 Q3 ELECTROCHEMISTRY

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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来源期刊

Fuel Cells 工程技术-电化学

CiteScore

5.80

自引率

3.60%

发文量

审稿时长

3.7 months

期刊介绍： This journal is only available online from 2011 onwards. Fuel Cells — From Fundamentals to Systems publishes on all aspects of fuel cells, ranging from their molecular basis to their applications in systems such as power plants, road vehicles and power sources in portables. Fuel Cells is a platform for scientific exchange in a diverse interdisciplinary field. All related work in -chemistry- materials science- physics- chemical engineering- electrical engineering- mechanical engineering- is included. Fuel Cells—From Fundamentals to Systems has an International Editorial Board and Editorial Advisory Board, with each Editor being a renowned expert representing a key discipline in the field from either a distinguished academic institution or one of the globally leading companies. Fuel Cells—From Fundamentals to Systems is designed to meet the needs of scientists and engineers who are actively working in the field. Until now, information on materials, stack technology and system approaches has been dispersed over a number of traditional scientific journals dedicated to classical disciplines such as electrochemistry, materials science or power technology. Fuel Cells—From Fundamentals to Systems concentrates on the publication of peer-reviewed original research papers and reviews.