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

页码：20440 / 20447

页数：8