Vacuum plasma sprayed electrodes for advanced alkaline water electrolysis
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Cited by (34)
Performance of nickel electrode for alkaline water electrolysis prepared by high pressure cold spray
2020, International Journal of Hydrogen EnergyA novel nickel electrode with gradient porosity distribution for alkaline water splitting
2020, International Journal of Hydrogen EnergyElectrochemical characterization of Raney nickel electrodes prepared by atmospheric plasma spraying for alkaline water electrolysis
2019, Journal of Industrial and Engineering ChemistryCitation Excerpt :The current density of the polished Ni electrode is smaller since the electrode has fewer active sites than the Raney Ni electrode, which has a porous structure. Table 1 compares the data from Tafel analysis obtained from previous studies [20,28] and data calculated from the LSV results of the Raney Ni electrode. In this study, the Tafel slopes for HER are −133 and 54 mV/dec for the polished Ni and Raney Ni electrodes, respectively.
Evaluation of Raney nickel electrodes prepared by atmospheric plasma spraying for alkaline water electrolysers
2013, International Journal of Hydrogen EnergyCitation Excerpt :A number of different techniques have been employed for Raney nickel preparation including: electrodeposition [17], plasma spraying [18–20], rolling of Al and Ni foils followed by heat treatment [21,22], pressing and heating of Ni + Al powders [18,23], pressing Raney-Ni with fractal Ni powder [23], and sintering Ni [18,24]. Raney nickel electrodes produced by the technique of vacuum plasma spraying (VPS) has exhibited one of the best efficiencies reported in the literature for HER [19,20]. However, in this technique, complex devices and design are required to maintain the low pressure in the chamber during the plasma spray process [25].
Characterization of Fe-Zn-R (R = rare earth metal) crystalline alloys as electrocatalysts for hydrogen evolution
2008, International Journal of Hydrogen EnergyCitation Excerpt :In respect to the former, several attempts have been made to explain the characteristics of hydrogen overpotential of individual metals using various physical and/or electronic parameters, including the atomic number [8], the work function [9], the bond strength of metals [10], the heat of adsorption of hydrogen on metals [11] and the electronegativity [12]. With respect to the enhancement of the electrocatalytic activity by increasing the active surface area of the electrode, Ni-,Co- and Fe-based Raney-type alloys have been successfully employed to fabricate HER cathodes in alkaline electrolysers [13–17]. Raney-type electrodes are made of alloys of nickel, cobalt or iron with another more active metal (Al or Zn), which can be leached in alkaline solution producing high surface area electrodes.