Abstract
Abstract Hydrous oxide growth on rhodium electrodeposited on titanium was investigated with respect to electrocatalytic activity and stability of the coating in the oxygen evolution reaction from 1 mol dm −3 NaOH solution. An enhancement of the charge storage capacity by a factor of about four was achieved by square-wave pulsing between − 1.05 V and 0.45 V vs. SCE. The grown oxide exhibited, depending on the potential, a rate of oxygen evolution enhanced by about one order of magnitude accompanied by a decrease of the Tafel slope from 95 mV / decade to 65 mV / decade. Both untreated and activated coatings were stable within 6 h of anodic galvanostatic polarization at 0.04 A cm −2 .
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