A study on the composite LaNi5/Ni–S alloy film used as HER cathode in alkaline medium

Alkaline Water Electrolysis

“…During power-off periods, absorbed hydrogen is electrochemically released at a sufficiently low potential to prevent corrosion. The properties of a composite material that combines a hydrogen storage material and nickel-sulphur alloy have also been reported [23]. The HER activity of this composite was shown to be higher than that of the Ni-S film and stability was also enhanced.…”

Magnesium: properties and rich chemistry for new material synthesis and energy applications

“…The large number of H atoms adsorbed on the catalyst surface can not only improve performance, but also prevent the dissolution of metal components during HER. 104,107 When the Ni-Mg-La electrode was employed at the cathode side for water splitting in 1.0 M KOH, it achieved a small overpotential of 70 mV at 10 mA cm À2 .…”

La2O3-Modified Nickel-Cobalt Composite Coating as Cathode Materials for Hydrogen Evolution Reaction

“…And the La 2 O 3 particles adsorbed on the cathodic surface could influence the course of electrodeposition by changing the double layer structure [27] . 12 24 Figure 3 were the steady-state polarization curves of Ni-Co alloy deposited coating electrode and the Ni-Co-La 2 O 3 composite coating electrode. It was apparent that the hydrogen evolution potential of the Ni-Co-La 2 O 3 composite coating electrode moved positively about 178 mV at current density of 15 mA cm -2 compared with that of Ni-Co alloy deposited coating electrode, indicating that the electrocatalytic activity to hydrogen evolution reaction enhanced largely.…”

“…Among them, electrodeposited Ni-Co alloy was one of the most common used materials for HER [7] . In order to further enhance electrocatalytic activity of nickel alloys, metal powders or oxides with special function, such as Mo powder, TiO x , RuO 2 , TiO 2 -supported RuO 2 , LaNi 5 , IrO 2 Pr 2 O 3 and AB 5 [8][9][10][11][12][13][14][15][16] , etc., were frequently incorporated into the alloy layer by composite electrodeposition technology, and the formed composite coatings yielded higher electrocatalytic activity and stability resulted from larger real surface areas of the electrodes. Moreover, the electrochemical codeposition process of particles and metallic ions is beneficial to achieve the synergetic effect of both species for electrocatalytic performance [13] .…”