Publication Date:
2013-10-24
Description:
Electrocatalysis, the approach dealing with enhancing the rates of electrochemical reactions by altering the surface properties of the electrodes on which these reactions proceed has been a topic of rapidly increasing interest. An intensive effort has recently been invested to develop new electrocatalytic materials for several applications such as the anodic oxygen evolution reaction (OER). The OER is principal in water electrolysis, an auxiliary reaction in the production of several substances forming at the cathode, and a side reaction in a number of anodic processes, particularly in the production of chlorine and other oxidizing agents.
The recent revolution in nanotechnology has stimulated the development of a large set of novel nano-sized materials for the OER. The use of nano-sized electrodes enhances the mass transport, enlarges the accessible active surface area, lowers the charged currents and reduces the deleterious effects of solution resistance.
Herein, we report on the electrocatalytic applications of platinum (Pt), gold (Au) and glassy carbon (GC) electrodes modified with nickel oxide (NiOx) nanoparticles towards the OER. The modification of the electrodes with NiOx nanoparticles has been done electrochemically. The scanning electron microscope (SEM) and the Energy dispersive X-ray spectroscopy (EDXS) are used to evaluate the surface morphology and composition of the modified electrodes.
Preliminary results revealed a significant enhancement in the electrocatalytic activity of the GC and Au electrodes towards the OER upon the modification with NiOx nanoparticles. This enhancement appeared in a cathodic shift of 750 mV and 550 mV in the onset potentials of the OER, respectively, on the NiOx-modified GC and Au electrodes.
Type:
Conference or Workshop Item
,
NonPeerReviewed
Format:
text
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