Journal
INORGANIC CHEMISTRY
Volume 60, Issue 5, Pages 3439-3446Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acs.inorgchem.1c00026
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Funding
- National Natural Science Foundation of China [NSFC 21671005]
- Anhui Provincial Natural Science Foundation for Distinguished Youth [1808085J27]
- Science and Technology Major Project of Anhui Province [18030901093]
- Recruitment Program for Leading Talent Team of Anhui Province
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This study successfully synthesized a new self-supporting electrode with high OER activity and stability. Characterization results indicate that coordinatively unsaturated metal sites are the active sites in OER.
Oxygen evolution reaction (OER) is a principal process in electrochemical energy conversion. Unfortunately, the sluggish reaction kinetics of OER hinders large-scale applications of those electrochemical energy conversion technologies. In this article, nickel-based metal-organic framework nanosheets attached on carbon nanotube films were successfully synthesized. The self-supporting electrode exhibits a fascinating activity with an overpotential of 221 mV at a current density of 10 mA cm(-2) and long-term stability with 24 h without noticeable changes of current density. In situ Fourier transform infrared testing reveals the formation of the key active intermediates (HO*, O*, and HOO*) during the OER process. A series of material characterization demonstrated that coordinatively unsaturated metal sites on the Ni BDC are the real active sites in OER.
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