期刊
CHEMISTRY-A EUROPEAN JOURNAL
卷 24, 期 9, 页码 2075-2079出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/chem.201705606
关键词
alkaline conditions; cobalt; in situ formation; metal-organic frameworks; oxygen evolution reactions
资金
- National Natural Science Foundation of China [21575137, 21575050]
- National Key Scientific Instrument and Equipment Development Project of China [21627809]
- Taishan Scholar Foundation of Shandong Province [ts20130937]
Energy conversion and storage systems such as water splitting devices and metal-air batteries need excellent and energy-efficiency oxygen evolution reaction (OER) catalysts. This work reports the in situ development of sawtooth-like Co(TCNQ)(2) (TCNQ=tetracyanoquinodimethane) metal-organic framework array on Co foil (Co(TCNQ)(2)/Co) by means of a solution immersion method at room temperature. As an oxygen-evolving catalyst, the resulting Co(TCNQ)(2)/Co demonstrates superior OER activity with overpotential of 310 mV to drive a geometrical catalytic current density of 15 mA cm(-2) in 1.0 M KOH. Notably, it also shows good long-term electrochemical durability with its activity being retained for at least 20 h and achieves a high turnover frequency of 0.66 molO(2)s(-1) at overpotential of 380 mV.
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