Highly ordered micro-meso-macroporous Co-N-doped carbon polyhedrons from bimetal-organic frameworks for rechargeable Zn-air batteries

被引：0

作者：

Hao, Yaxin ^{[1
]}

Kang, Yumao ^{[1
]}

Mi, Yajun ^{[1
]}

Wang, Wei ^{[2
]}

Lei, Ziqiang ^{[1
]}

机构：

[1] Key Laboratory of Eco-Environment-Related Polymer Materials, Ministry of Education of China, Key Laboratory of Gansu Polymer Materials, College of Chemistry and Chemical Engineering, Northwest Normal University, Lanzhou,730070, China

[2] School of Chemical and Biological Engineering, Lanzhou Jiaotong University, Lanzhou,730070, China

来源：

Journal of Colloid and Interface Science | 2021年 / 598卷

基金：

中国国家自然科学基金;

关键词：

Binary alloys - Doping (additives) - Zinc alloys - Carbon - Oxygen - Electrolytic reduction - Porosity - Organic polymers - Oxygen reduction reaction - Cobalt alloys - Metal-Organic Frameworks - Electrocatalysts - Metals;

D O I：

暂无

中图分类号：

学科分类号：

摘要：

Rational design of non-precious metal catalysts for efficient oxygen reduction and oxygen evolution reactions (ORR/OER) is important for rechargeable metal-air batteries. Building highly ordered porous structures while maintaining their overall crystalline orderliness is highly desirable, but remains an arduous challenge. Here, we have synthesized bimetallic metal-organic frameworks (MOFs) on highly ordered three-dimensional (3D) polystyrene templates by controlling the nucleation process. The ordered macropores with 190 nm diameters were uniformly distributed on the as-prepared ZnCo zeolitic imidazolate framework (ZnCo-ZIF). Afterwards, 3D ordered micro-meso-macroporous Co-N-doped carbon polyhedrons (3DOM Co-NCPs) was developed by calcination. With the synergy of the highly dispersed Co–N–C catalytic sites and the distinct porous structure, the synthesized 3DOM Co-NCPs exhibit impressive bifunctional activity. Additionally, the 3DOM Co-NCPs-900 for Zn-air battery exhibits extraordinary power density, high energy density, and acceptable stability. This approach offers a useful strategy for the fabrication of highly efficient electrocatalysts with 3D ordered porous. © 2021 Elsevier Inc.

引用

页码：83 / 92