Determination of the oxygen and hydrogen overvoltage in concentrated alkali hydroxide solutions

Preparation of porous spherical α-Ni(OH)2 and enhancement of high-temperature electrochemical performances through yttrium addition

“…The higher the temperature is, the lower the OER potential is. The result is in accordance with those of Balej [32] and Rubin and Baboian [33]. Due to the diminishment of the difference between the Ni(OH) 2 oxidation potential and the oxygen evolution potential, charge efficiency decreases accordingly at ele- vated temperatures.…”

A study on the structure and electrochemical properties of La2Mg(Ni0.95M0.05)9 (M = Co, Mn, Fe, Al, Cu, Sn) hydrogen storage electrode alloys

“…The high rate dischargeability HRD (%) defined as C n × 100/(C n + C 50 ), was determined from the ratio of the discharge capacity C n (with n = 400, 800, 1200 mA/g, respectively) to the total discharge capacity defined as the sum of C n and C 50 , which was the additional capacity measured subsequently at 50 mA/g after C n was measured. The electrochemical potential composition (EC) isotherms were plotted by using the pulse charge/discharge method at 25 mA/g, and the equilibrium hydrogen pressure P eq was calculated from the measured equilibrium electrode potential E eq according to the Nernst equation [21]:…”

Structure and electrochemical properties of La2−xMgxNi7.0 (x=0.3–0.6) hydrogen storage alloys

“…Therefore, P-C isotherms could be determined by electrochemical method according to the Nernst equation [17]:…”