2021/02/16 by Chenchen Qiang, Min Liu, Liang Zhang +2
Energy · Engineering · #Electrocatalysts for Energy Conversion #Advanced battery technologies research #Fuel Cells and Related Materials
paper · doi:10.1021/acs.inorgchem.1c00026
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.