Polymer Thin Films Embedded with Nickel-Copper Nanoparticles for Electrocatalytic Water Oxidation

quick survey of the scientific literature reveals that many efforts have been devoted to thestudy of the oxygen evolution reaction (OER) with some inspirations from nature [1]. OER, theproduction of O2 by the electrochemical oxidation of water (H2O), is a key component of manyimportant energy conversion and storage systems that utilize water-splitting as well as metal-airrechargeable batteries. Electrochemical oxidation of H2O has rather sluggish kinetics due to thehigh activation energy barrier needed for the formation of O-O bonds [2]. Therefore, efficientelectrocatalysts are needed to drive the OER in a reasonable potential range.Hereupon, in this work, a promising electrocatalyst was developed based on a layer processby electropolymerization of ortho-aminophenol (OAP) on the surface of a nanoporous glassycarbon electrode was constructed as a proper polymeric framework for deposition of nickelcoppernanoparticles for the first time. After physicochemical characterizations of nickel-coppernanoparticles /poly(OPA)/nanoporous/GCE, Then the prepared modified electrode were used forthe first time as efficient electrocatalyst materials to fabricate the modified electrodes for wateroxidation in neutral media. The fabricated modified electrodes possess good electrocatalyticactivity for water oxidation in neutral pH condition. The obtained results show that the preparedcomposite with nanosheet structure exhibit a progressive OER performance; providing a lowonset potential, small Tafel slope, and stable operation for more than 12 h.

کلیدواژه ها:

Water Oxidation ، Electrocatalyst ، Ortho-aminophenol ، Nanoporous