Article ID Journal Published Year Pages File Type
4767676 Electrochimica Acta 2016 11 Pages PDF
Abstract
The authors propose a new method to easily and reliably determine the exchange current density (i0) of hydrogen evolution reaction (her). The validity of a novel method named the differential polarization method (DPM) was ascertained by the estimation of i0 on platinum electrode in acid solutions. The hers in 0.005, 0.05 and 0.5 mol dm−3 H2SO4 solutions were visually categorized as reversible reactions. The obtained i0 had constant values of about 0.5 mA cm−2, corresponding to the appearance of a vertical line on the anodic polarization resistance curve. This DPM shows the i0 is corresponds to the limiting diffusion current density of the hydrogen oxidation reaction. We believe that the DPM has the potential to be a beneficial and reliable method for estimating electrochemical parameters.
Related Topics
Physical Sciences and Engineering Chemical Engineering Chemical Engineering (General)
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