Kinetics of hydrogen evolution reaction on nanocrystalline electrodeposited Ni62Fe35C3 cathode in alkaline solution by electrochemical impedance spectroscopy

Hydrogen evolution reaction at Ru-modified nickel-coated carbon fibre in 0.1 M NaOH

“…4) showed a fairly good linear dependence for both examined fi bre electrodes, over the studied overpotential range. The above is consistent with the kinetically-controlled reaction [22][23][24][25] , which proceeds via the Volmer-Heyrovsky path (see equations 1 and 2 above). The exchange current-densities (j 0 ) for the HER were calculated based on the Butler-Volmer equation (see e.g.…”

Electrocatalytic activity of porous Ni–Fe–Mo–C–LaNi5 sintered electrodes for hydrogen evolution reaction in alkaline solution

“…74 It was found that Ni-Fe-C cathodes prepared by electrodeposition had high catalytic activity and stability for the HER in sodium hydroxide solution, in which the observed activity was mainly due to the intrinsic activity induced by carbon embedded into Ni-Fe matrix. [37][38][39] Therefore, this is due to an improved intrinsic activity of the material, which was explained on the basis of the synergism among the catalytic properties of Ni and of Fe, Mo, and induced by C embedded into Ni-Fe matrix and Ni-Fe-Mo matrix. LaNi 5 enhances the H adsorption on the electrode surface and mainly plays a role of hydrogen storage for hydrogen evolution reaction.…”

“…It was found that Ni-Fe-C cathodes prepared by electrodeposition had high catalytic activity and stability for the HER in sodium hydroxide solution, in which the observed activity was mainly due to the intrinsic activity induced by carbon embedded into Ni-Fe matrix. [37][38][39] Moreover, Machida and Enyo 40 published that LaNi 5 and other combinations of rare-earth metals and Ni, used as cathode come close to the reversible hydrogen electrode over a wide range of current densities. The authors highlighted the good performance of the electrode materials and proposed that the HER on the LaNi 5 alloys proceeds via the Volmer-Tafel reaction route with mixed rate determining characteristics.…”

Alkaline Electrolysis with Skeletal Ni Catalysts

“…A carbon 1.59% weight percent produced a 3.4 nm grain size and the lowest overpotential for the HER at polarization current density 0.12 A/cm2. In a layer by layer preparation of Ni-Fe-C electrodes on Cu [21], Tafel slope of 116 mv dec -1 was measured.…”