Turning on electrocatalytic oxygen reduction by creating robust Fe-Nx species in hollow carbon frameworks via in situ growth of Fe doped ZIFs on g-C3N4

被引：38

作者：

Wang, Guizhi ^{[1
]}

Deng, Jiang ^{[1
]}

Yan, Tingting ^{[1
]}

Zhang, Jianping ^{[1
]}

Shi, Liyi ^{[1
]}

Zhang, Dengsong ^{[1
]}

机构：

[1] Shanghai Univ, State Key Lab Adv Special Steel, Sch Mat Sci & Engn, Res Ctr Nano Sci & Technol,Dept Chem, Shanghai 200444, Peoples R China

来源：

NANOSCALE | 2020年 / 12卷 / 09期

基金：

中国国家自然科学基金;

关键词：

METAL-ORGANIC FRAMEWORKS; EFFICIENT; NANOPARTICLES; BOOST;

D O I：

10.1039/d0nr00138d

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Iron-nitrogen-carbon (Fe-N-C) electrocatalysts have been demonstrated to be promising candidates to substitute conventional Pt/C electrocatalysts in the oxygen reduction reaction (ORR) due to the benefits of high efficiency and affordable price. Unfortunately, Fe is prone to aggregation upon high-temperature treatment, which may cover the active sites of the Fe-N-x species and further affect the ORR performance. Thus, the key issue is to avoid Fe aggregation and keep it uniformly dispersed as much as possible. In this work, Fe-N-C catalysts with robust Fe-N-x species in hollow carbon frameworks were created via in situ growth of Fe doped Zn based zeolitic imidazolate frameworks (ZIFs) on g-C3N4 with the subsequent pyrolysis treatment. The developed catalysts demonstrate superb ORR activity, high resistance to methanol and ultralong stability as compared with traditional Pt/C catalysts in alkaline solution. The brilliant performance benefits from the firm connection and robust structure of the optimal Fe-N-x species that are homogeneously dispersed in the hollow carbon frameworks. This work presents a facile and reasonable strategy for the development of excellent ORR electrocatalysts.

引用

页码：5601 / 5611

页数：11

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