Effect of alloys modified by sodium borohydride alkaline solutions on the kinetics of hydrogen evolution reaction at Mm(Ni3.6Co0.7Mn0.4Al0.3)1.15 hydride electrodes

Studies of Modified Hydrogen Storage Intermetallic Compounds Used as Fuel Cell Anodes

“…The above two factors enhance the formation of Ni-rich layers, thus increasing the adsorbability of hydrogen and the electrocatalytic activity of the alloy surface, hence giving better electrocatalytic characteristics to the anode alloys. Further studies on the beneficial effects of borohydride solutions on the pre-treatment of HSAs for anode electrodes have also been recently reported by our group [19][20][21].…”

Hydrogen Generation by Water Electrolysis

“…Not in passing, given that recent analysis has demonstrated that neither Ru nor Ti are bare metals in the HER region, it is suggested that, in fact, experimentally it is very difficult (impossible) to determine unambiguously solely based on the M-H ads energetics what would be the correct position of these two elements in the observed volcano relationship. This is most likely also true for the HER in alkaline solutions, when the rates of the reaction are much slower than in acidic environments [22].…”

“…is the anodic overvoltage; η c V ðÞ is the cathodic overvoltage; R (Ω) is the global resistance and I (A) is the current. Figure 1 shows the relationship between the electrolyzer cell potential and operating temperature [19][20][21][22]. The cell potential-temperature plane is divided into three zones by the so-called equilibrium voltage line and thermo-neutral voltage line.…”

“…On the other hand, at high temperatures, the recombination step (Eq. 22) controls the reaction on Ni electrode [22][23][24][25][26][27][28][29][30].…”

Improvement of the rate performance of hydrogen storage alloys by heat treatments in Ar and H2/Ar atmosphere for high-power nickel–metal hydride batteries

“…LaNi 5 -type MH alloys are the most suitable negative electrode materials for Ni-MH batteries [6][7][8][9]. The performance of MH alloys can be improved through surface coating with Cu, Cu 2 O, Pd, and Ni [10][11][12][13][14] and treatments with alkaline and fluoride solutions [15][16][17][18][19][20]. These methods mainly modify the surface composition of the alloy to enhance electrocatalytic activity and surface stability.…”