Tuning the coordination environment of Fe atoms enables 3D porous Fe/ N-doped carbons as bifunctional electrocatalyst for rechargeable zinc-air battery

被引：9

作者：

Huang, Yaling ^{[1
]}

Zhang, Yafei ^{[1
,6
]}

Hao, Jiayu ^{[1
]}

Wang, Yanqiu ^{[1
]}

Yu, Jiawen ^{[1
]}

Liu, Yang ^{[1
]}

Tian, Zhongliang ^{[4
]}

Chan, Ting -Shan ^{[5
]}

Liu, Min ^{[3
]}

Li, Wenzhang ^{[1
,2
]}

Li, Jie ^{[1
]}

机构：

[1] Cent South Univ, Sch Chem & Chem Engn, Changsha 410083, Peoples R China

[2] Cent South Univ, Hunan Prov Key Lab Chem Power Sources, Changsha 410083, Peoples R China

[3] Cent South Univ, Sch Phys & Elect, Changsha 410083, Peoples R China

[4] Cent South Univ, Sch Met & Environm, Changsha 410083, Peoples R China

[5] Natl Synchrotron Radiat Res Ctr, Hsinchu 30076, Taiwan

[6] China Natl Nucl Corp, Changsha Uranium Geol Res Inst, Beijing, Peoples R China

来源：

JOURNAL OF COLLOID AND INTERFACE SCIENCE | 2022年 / 628卷

基金：

中国国家自然科学基金;

关键词：

3D porous carbon; CeO2; Oxygen reduction reaction; FeN2; moieties; Zinc-air battery; National; OXYGEN REDUCTION REACTION; TOTAL-ENERGY CALCULATIONS; IRON; NANOPARTICLES; ZN; ELECTRODE; MECHANISM; CATALYSTS; ORR;

D O I：

10.1016/j.jcis.2022.09.066

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

As one of the most promising candidates for power sources, the rechargeable Zn-air batteries have attracted much attention due to their high energy density. However, Zn-air batteries suffer from sluggish kinetics of oxygen reduction (ORR) and oxygen evolution reaction (OER) during the discharge and charge process. Herein, a FeN2-doped carbon with a unique three-dimensional (3D) porous structure (CeO2- FeNC-5) was synthesized as an electrocatalyst for Zn-air batteries by one-step pyrolysis and introducing CeO2 to tune the coordination environment of Fe atoms. Extended X-ray absorption fine structure (EXAFS) results indicate that the introduction of CeO2 can convert FeN3 moieties into FeN2 moieties. The CeO2-FeNC-5 exhibits a more positive half-wave potential of 0.902 V for ORR, and a low overpotential of 0.327 Vat 10 mA cm -2 for OER. Furthermore, the Zn-air battery with CeO2-FeNC-5 achieve a maximum power density (169 mW cm2), a high open voltage platform (1.47 V) and superior cycling stability (200 h). The unique 3D porous structure provides channels for mass transport and exposes sufficient

引用

页码：1067 / 1076

页数：10

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