期刊
CHEMISTRY-AN ASIAN JOURNAL
卷 14, 期 9, 页码 1590-1594出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/asia.201900328
关键词
electrochemistry; metal-organic frameworks; nanosheets; overpotential; oxygen evolution reaction
资金
- National Natural Science Foundation of China [51602301, 51672251]
- Science Foundation of Zhejiang Sci-Tech University (ZSTU) [13012138-Y]
Non-noble metal-based metal-organic framework (MOF)-derived electrocatalysts have recently attracted great interest in the oxygen evolution reaction (OER). Here we report a facile synthesis of nickel-based bimetallic electrocatalysts derived from 2D nanosheet-assembled nanoflower-like MOFs. The optimized morphologies and large Brunauer-Emmett-Teller (BET) surface area endow FeNi@CNF with efficient OER performance, where the aligned nanosheets can expose abundant active sites and benefit electron transfer. The complex nanoflower morphologies together with the synergistic effects between two metals attributed to the OER activity of the Ni-based bimetallic catalysts. The optimized FeNi@CNF afforded an overpotential of 356mV at a current density of 10mAcm(-2) with a Tafel slope of 62.6mVdec(-1), and also exhibited superior durability with only slightly degradation after 24hours of continuous operation. The results may inspire the use of complex nanosheet-assembled nanostructures to explore highly active catalysts for various applications.
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