NiCo-BDC derived Co3+ enriched NiCoxOy/NF nanosheets for oxygen evolution reaction

In recent years, transition metal catalysts due to their low price, excellent conductivity and high activity have been extensively studied in OER . It is worth noting that Co 3+ plays a vital role in the process of oxygen evolution catalysis, because Co 3+ ions are considered to be active sites. The development of catalysts with high Co 3+ content has important application prospects for improving water oxidation efficiency. This paper uses a simple ligand-assisted synthesis method to promote the transformation of two-dimensional layered double hydroxides (LDHs) into two-dimensional metal organic frameworks (MOFs). MOF-OH/NF are quickly and easily prepared by electrooxidation , which exhibit superior OER properties, with a low overpotential of 260 mV and 420 mV for the oxygen evolution reaction (OER) at 100 mA cm −2 and 1000 mA cm −2 . Moreover, the MOF-OH/NF has good stability in 1.0 M KOH electrolyte solution . This study provides a new idea for the design and synthesis of novel composite electrocatalysts .