Self-Templated Hierarchically Porous Carbon Nanorods Embedded with Atomic Fe-N4 Active Sites as Efficient Oxygen Reduction Electrocatalysts in Zn-Air Batteries

被引：147

作者：

Gong, Xiaofei ^{[1
]}

Zhu, Jianbing ^{[2
]}

Li, Jiazhan ^{[1
]}

Gao, Rui ^{[2
]}

Zhou, Qingyan ^{[1
]}

Zhang, Zhen ^{[2
]}

Dou, Haozhen ^{[2
]}

Zhao, Lei ^{[1
,2
]}

Sui, Xulei ^{[1
]}

Cai, Jiajun ^{[1
]}

Zhang, Yunlong ^{[1
]}

Liu, Bing ^{[1
]}

Hu, Yongfeng ^{[3
]}

Yu, Aiping ^{[2
]}

Sun, Shu-hui ^{[4
]}

Wang, Zhenbo ^{[1
]}

Chen, Zhongwei ^{[2
]}

机构：

[1] Harbin Inst Technol, Sch Chem & Chem Engn, MIIT Key Lab Crit Mat Technol New Energy Convers, State Key Lab Urban Water Resource & Environm, Harbin 150001, Peoples R China

[2] Univ Waterloo, Waterloo Inst Nanotechnol, Waterloo Inst Sustainable Energy, Dept Chem Engn, Waterloo, ON N2L 3G1, Canada

[3] Univ Saskatchewan, Canadian Light Source, Saskatoon, SK S7N 0X4, Canada

[4] Ctr Energie Mat Telecommun, Inst Natl Rech Sci INRS, 1650 Boul Lionel Boulet, Varennes, PQ J3X 1S2, Canada

来源：

ADVANCED FUNCTIONAL MATERIALS | 2021年 / 31卷 / 08期

基金：

中国博士后科学基金; 加拿大自然科学与工程研究理事会; 中国国家自然科学基金; 加拿大健康研究院;

关键词：

1D Fe; O-2; (3) template; atomic Fe‐ N; (4) sites; hierarchically porous nanorods; in situ polymerization; Zn‐ air batteries; METAL-ORGANIC FRAMEWORK; N-C ELECTROCATALYSTS; MESOPOROUS CARBON; DOPED GRAPHENE; CATALYSTS; NITROGEN; IRON; NANOPARTICLES; PERFORMANCE; ORR;

D O I：

10.1002/adfm.202008085

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Iron-nitrogen-carbon materials are being intensively studied as the most promising substitutes for Pt-based electrocatalysts for the oxygen reduction reaction (ORR). A rational design of the morphology and porous structure can promote the accessibility of the active site and the reactants/products transportation, accelerating the reaction kinetics. Herein, 1D porous iron/nitrogen-doped carbon nanorods (Fe/N-CNRs) with a hierarchically micro/mesoporous structure are prepared by pyrolyzing the in situ polymerized pyrrole on the surface of Fe-MIL-88B-derived 1D Fe2O3 nanorods (MIL: Material Institut Lavoisier). The Fe2O3 nanorods not only partially dissolve to generate Fe3+ for initiating polymerization but serve as templates to form the 1D structure during polymerization. Furthermore, the pyrrole coated Fe2O3 nanorod architecture prevents the porous structure from collapsing and protects Fe from aggregation to yield atomic Fe-N-4 moieties during carbonization. The obtained Fe/N-CNRs display exceptional ORR activities (E-1/2 = 0.90 V) and satisfactory long-term durabilities, exceeding those for Pt/C. Furthermore, the unprecedented Fe/N-CNRs catalytic performance is demonstrated with Zn-air batteries, including a superior maximum power density (181.8 mW cm(-2)), specific capacity (998.67 W h kg(-1)), and long-term durability over 100 h. The prominent performance stems from the unique 1D structure, hierarchical pore system, high surface area, and homogeneously dispersed single-atom Fe-N-4 moieties.

引用

页数：10

共 81 条

[41] Two-Dimensional Phosphorus-Doped Carbon Nanosheets with Tunable Porosity for Oxygen Reactions in Zinc-Air Batteries [J].