Mesoporous Hollow Nitrogen-Doped Carbon Nanospheres with Embedded MnFe2O4/Fe Hybrid Nanoparticles as Efficient Bifunctional Oxygen Electrocatalysts in Alkaline Media

被引：83
作者：
Wu, Xiuju [1 ,2 ]
Niu, Yanli [1 ,2 ]
Feng, Bomin [1 ,2 ]
Yu, Yanan [1 ,2 ]
Huang, Xiaoqin [1 ,2 ]
Zhong, Changyin [1 ,2 ]
Hu, Weihua [1 ,2 ]
Li, Chang Ming [1 ,2 ]
机构：
[1] Southwest Univ, Fac Mat & Energy, Inst Clean Energy & Adv Mat, Chongqing 400715, Peoples R China
[2] Chongqing Key Lab Adv Mat & Technol Clean Energie, Chongqing 400715, Peoples R China
来源：
ACS APPLIED MATERIALS & INTERFACES | 2018年 / 10卷 / 24期
关键词：
MnFe2O4/Fe nanoparticles; mesoporous hollow carbon nanospheres; Zn-air battery; bifunctional catalyst; oxygen reduction reaction; oxygen evolution reaction; REDUCTION REACTION ORR; METAL-FREE CATALYSTS; EVOLUTION REACTION; AIR BATTERIES; NANOCRYSTAL ASSEMBLIES; MN NANOPARTICLES; RECENT PROGRESS; FUEL-CELLS; ZN-AIR; GRAPHENE;
D O I：
10.1021/acsami.8b04012
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
Exploring sustainable and efficient electrocatalysts for oxygen reduction reaction (ORR) and oxygen evolution reaction (OER) is necessary for the development of fuel cells and metal air batteries. Herein, we report a bimetal Fe/Mn-N-C material composed of spinel MnFe2O4/metallic Fe hybrid nano particles encapsulated in N-doped mesoporous hollow carbon nanospheres as an excellent bifunctional ORR/OER electrocatalyst in alkaline electrolyte. The Fe/Mn-N-C catalyst is synthesized via pyrolysis of bimetal ion-incorporated polydopamine nanospheres and shows impressive ORR electrocatalytic activity superior to Pt/C and good OER activity close to RuO2 catalyst in alkaline environment. When tested in Zn-air battery, the Fe/Mn-N-C catalyst demonstrates excellent ultimate performance including power density, durability, and cycling. This work reports the bimetal Fe/Mn-N-C as a highly efficient bifunctional electrocatalyst and may afford useful insights into the design of sustainable transition-metal-based high-performance electrocatalysts.
引用
收藏
页码：20440 / 20447
页数：8
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