Hg/HgO electrode and hydrogen evolution potentials in aqueous sodium hydroxide

Hydrogel-based flexible micro-reference electrodes for use in alkaline and neutral pH solutions

“…Assuming an OH − concentration c OH − of 0.1 and an activity coefficient γ OH − of 0.7820 [38] and a standard electrode potential E 0 HgjHg 2þ of 0.85 V [39], the electrode potential is theoretically 0.163 V, which is in good agreement with the measured electrode potential of the flexible reference electrode.…”

Determination of kinetic parameters for the hydrogen evolution reaction on the electrodeposited Ni–MoO2 composite coating in alkaline solution

“…Hydrogen of 99.999 vol.% purity was continually introduced in the cell in order to establish controlled conditions of a gas phase above the solution, which was considered to be composed only of H 2 and the H 2 O vapor, with their partial pressures being constant over the course of experiments. Using the correlated empirical equations for calculation of the vapor pressure of water and activity coefficients of OH À and H 2 O as a function of the molality and temperature of NaOH solution [37], the theoretical value of the equilibrium potential of the HER under stated conditions was calculated to be À0.923 V vs. the standard hydrogen electrode [36], i.e. À1.163 V vs. SCE [38].…”

Characterization and Electrochemical Behaviour of Nanoscale Hydrotalcite-Like Compounds toward the Reduction of Nitrate

“…Figure 4 A shows the electrolytic activities of various electrodes in 1 M NaOH solution. The onset potential for the current density of 10 mA/cm 2 was within the range from −0.72 V to −0.94 V (vs. Hg/HgO) for various HTLCs, which can be calibrated to a normal hydrogen electrode (NHE) with a value from −0.622 V to −0.842 V [ 28 , 29 ]. The reducing peak may be ascribed to two main electrolytic processes.…”