Electrocatalytic properties of electrodeposited Ni–15Mo cathodes for the HER in acid solutions: Synergistic electronic effect

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 Properties of Co-Mo Alloys Electrodeposited from a Citrate-Pyrophosphate Electrolyte

“…in [8][9][10]. This effect manifests itself on the alloys whose components have different properties with respect to hydrogen evolution reaction, namely, a different reaction mechanism is realized on different metals.…”

“…It is known from literature that these requirements are met by transition metal alloys, namely, molybdenum and tungsten alloys of iron subgroup metals, which show electrocatalytic properties towards the hydrogen evolution reaction in both acid [8][9][10][11] and alkaline aqueous solutions [12][13][14][15], and that the use of the electrochemical method for the deposition of thin alloy coatings makes it possible to reduce the cost of electrode materials and hence the cost of produced hydrogen.…”

On the Temperature Dependence of Hydrogen Evolution Reaction at Nickel Foam and Pd-Modified Nickel Foam Catalysts

“…Based on the linear relationship − log R ct versus overpotential (for kinetically controlled reactions), exhibited here over the overpotential range of 50-400 mV versus RHE (see Fig. 5 above), the exchange currentdensities for the HER were calculated based on the Butler-Volmer equation and through utilization of the relation between the exchange current density (j 0 ) and the R ct parameter for overpotential approaching zero value [5,[40][41][42]. Hence, the impedance-derived values of the j 0 parameter came to 1.2×10 −6 A cm −2 (at 20°C) and 2.0× were recorded for the Pd-modified nickel foam catalyst material (see Table 3 for details).…”