Investigation of noble metal loading CoWZn electrode for HER
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Date
2017Metadata
Citation
Telli, E., Farsak, M., Kardaş, G. (2017). Investigation of noble metal loading CoWZn electrode for HER. International Journal of Hydrogen Energy, 42(36), 23260-23267. DOI: 10.1016/j.ijhydene.2017.03.103Abstract
It is important to metal deposition on the electrode surface to increase the electrocatalytic
activity of the electrodes. CoWZn coated the graphite rod was used to prepare the cathode
electrode. Moreover, then Pt and Ru metals were deposited on the electrode surface. These
electrodes were named as CoWZnPt and CoWZnRu. Cyclic voltammetry, electrochemical
impedance spectroscopy, and potentiodynamic polarization techniques were used for
characterization of electrodes in alkaline media. Hydrogen evolution efficiency was
determined by accumulated of hydrogen gas. The catalytic activity for hydrogen evolution
reaction of CoWZn, CoWZnPt, and CoWZnRu electrodes was compared. It was reported
that modification of the CoWZn electrode with low amounts of Ru enhances the HER activity
of the electrodes. The enhancement in the hydrogen evolution activity of the electrodes
was attributed to the increase in their real surface area and/or a possible synergistic
effect between Co, W, Zn and Ru as well as the well-known intrinsic catalytic activity of Ru.