Performance Enhancement of Alkaline Water Electrolyzer Using Nanostructured Electrodes Synthetized by Template Electrosynthesis

Ni alloy nanowires as high efficiency electrode materials for alkaline electrolysers

“…A straightforward method for obtaining electrodes based on ordered arrays of NWs is template electrosynthesis. Through this method, we have fabricated electrodes based on Ni NWs that have a very high surface area and good catalytic performance [36][37][38]. Besides, we have also shown that Ni NWs obtained by template electrosynthesis and covered with nanoparticles of IrO 2 [19] as an anode and Pd as a cathode [39] of alkaline electrolysers, have good and stable performance also at room temperature.…”

Nanostructured Ni Based Anode and Cathode for Alkaline Water Electrolyzers

“…Electrodes were electrochemical characterized by cyclovoltammetry (CV) and quasi-steady-state polarization (QSSP) in KOH solution at room temperature. In the same solution, the performance of electrode with and without catalyst was evaluated as detailed in [53][54][55].…”

“…For this aim In order to decrease this voltage dissipation, we have focused our attention on the fluid dynamics of electrolyzers to quickly remove the gas bubbles produced at the electrodes. For this aim we have developed a homemade cell obtained with a 3D printer (Figure 12), as detailed in [55]. Preliminary results show that by using this cell [55], the performance of electrolyze increases but further experiments are in progress with continuous recycling of the electrolyte, which favors the outflow of gas, and at high temperature than the room one.…”

“…For this aim we have developed a homemade cell obtained with a 3D printer (Figure 12), as detailed in [55]. Preliminary results show that by using this cell [55], the performance of electrolyze increases but further experiments are in progress with continuous recycling of the electrolyte, which favors the outflow of gas, and at high temperature than the room one. Besides many geometric parameters of the cell are under studying in order to improve its efficiency.…”

“…Particularly, we have focused our attention on the template electrosynthesis of ordered array of Ni nanowires (Ni-NWs). These electrodes have a surface area about 70 times higher than geometrical one, and can be functionalized with different electrocatalysts both for HER and OER [52][53][54][55]. Ni was selected owing to its low cost and high chemical stability in alkaline environment and because it is part of the strategy pursued by several researchers to develop catalysts based on earth abundant transitional metals [36,56].…”