Synergistic Binary Fe-Co Nanocluster Supported on Defective Tungsten Oxide as Efficient Oxygen Reduction Electrocatalyst in Zinc-Air Battery

被引：65

作者：

Han, Qinglin ^{[1
]}

Zhao, Ximeng ^{[1
]}

Luo, Yuhong ^{[1
]}

Wu, Lanlan ^{[1
]}

Sun, Shujuan ^{[1
]}

Li, Jingde ^{[1
]}

Wang, Yanji ^{[1
]}

Liu, Guihua ^{[1
]}

Chen, Zhongwei ^{[2
]}

机构：

[1] Hebei Univ Technol, Hebei Prov Key Lab Green Chem Technol & Highly Ef, Sch Chem Engn & Technol, Tianjin Key Lab Chem Proc Safety,Natl Local Joint, Tianjin 300130, Peoples R China

[2] Univ Waterloo, Dept Chem Engn, Waterloo, ON N2L 3G1, Canada

来源：

ADVANCED SCIENCE | 2022年 / 9卷 / 04期

基金：

中国国家自然科学基金;

关键词：

oxygen reduction reaction; oxygen-deficient support; synergistic effect; zinc-air batteries; POROUS CARBON; CATALYSTS; PERFORMANCE; GRAPHENE; ELECTRON;

D O I：

10.1002/advs.202104237

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Rational design of metal oxide supported non-precious metals is essential for the development of stable and high-efficiency oxygen reduction reaction (ORR) electrocatalysts. Here, an efficient ORR catalyst consisting of binary Fe/Co nanoclusters supported by defective tungsten oxide and embedded N-doped carbon layer (NC) with a 3D ordered macroporous architecture (3DOM Fe/Co@NC-WO2-x) is developed. The oxygen deficient 3DOM WO2-x not only serves as a porous and stable support, but also enhances the conductivity and ensures good dispersion of the binary Fe/Co nanocluster, benefiting its ORR catalytic activity. Theoretical calculation shows that there exists a synergistic effect of electron transfer from Fe to Co in the supported binary Fe/Co cluster, promoting the ORR reaction energetics. Accordingly, the 3DOM Fe/Co@NC-WO2-x catalyst exhibits excellent ORR activity in alkaline medium with a half wave potential (E-1/2) of 0.87 V higher than that of Pt/C (0.85 V). The zinc-air batteries assembled by 3DOM Fe/Co@NC-WO2-x cathode deliver a higher power density and specific capacity than that of Pt/C. A new strategy of combining synergistic binary-metal nanoclusters and conductive metal oxide support design is provided here to develop efficient and durable ORR electrocatalyst.

引用

页数：10

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