期刊
JOURNAL OF COLLOID AND INTERFACE SCIENCE
卷 598, 期 -, 页码 83-92出版社
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.jcis.2021.03.142
关键词
Co; N co-doping; Highly ordered micro-meso-macroporous; structure; Metal-organic frameworks; Bifunctional catalysts; Zn-air battery
资金
- National Natural Science Foundation of China [51863019]
- Science and Technology Program of Gansu Province [19JR2RA020]
- program of Changjiang Scholars and Innovative Research Team in University [IRT_15R56]
This study successfully synthesized bimetallic metal-organic frameworks (MOFs) on highly ordered three-dimensional templates, achieved highly ordered porous structures by controlling the nucleation process, and developed efficient electrocatalysts with impressive bifunctional activity.
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 macro pores 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. (c) 2021 Elsevier Inc. All rights reserved.
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