I prepare several material for electrocatalyst appliction for HER then I test them on potientiostat to measure the overpotiential, when i use the glassy carbon electrode the overpotiential recorded was very high so i try again but with using nickle working electrode the overpotential recorded became much lower than the first case, so what is the reason and is it right to sumbit the second case or the first one?
Basel Ahmed the reason is that each electrode material has different electrocatalytic efficiency. When you register a lower overpotential it means that less energy is required for the charge transfer reaction to occur. Therefore, the electrode where you have lower overpotential is more favorable for the reaction to occur.
In this paper we made some observations about this: Article Novel TiO2 nanoparticle-based sensor for xanthate quantifica...
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