期刊
SUSTAINABLE ENERGY & FUELS
卷 4, 期 7, 页码 3370-3377出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/d0se00548g
关键词
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资金
- National Natural Science Foundation of China [21705056, 21902062, 21904048]
- Natural Science Foundation of Shandong Province [ZR2019YQ10, ZR2018PB009]
- Young Taishan Scholars Program [tsqn201812080]
- Key RAMP
- D Program of Shandong Province [2019GSF111068]
Oxygen electrocatalysis is of great significance for various energy conversion and storage-related applications. Herein, by usingin situpolymerization of dopamine on specially designed metal-organic framework (MOF) nanocubes and subsequent annealing treatment, well-defined Co/N-doped carbon hollow nanocubes with high electrocatalytic activity and stability toward the oxygen evolution reaction are obtained. To attain a current density of 10 mA cm(-2), the overpotential required for the Co/N-doped carbon hollow nanocubes is only 285 mV, which is comparable to that of commercial RuO2(270 mV) and lower than those of most MOF-derived ones and other carbon supported Co-based electrocatalysts. Surprisingly, we find that when the Co nanoparticles are leached using simple acid wash, the as-synthesized N-doped carbon hollow nanocubes could act as an efficient electrocatalyst for the oxygen reduction reaction instead. The strategy presented here for controlled design and synthesis of MOF-derived hollow (metal)/N-doped carbon frameworks would offer new prospects for developing efficient oxygen electrocatalysts for electrochemical energy devices.
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