Effect of Heat-Treatment on the Mechanism and Kinetics of the Hydrogen Evolution Reaction on Ni–P + TiO₂+ Ti Electrodes

Electrocatalytic Activity of the Ni57.3Co42.7 Alloy for the Hydrogen Evolution

“…The deviation of Tafel slope at higher overvoltages is probably due to the formation of hydrides in the surface layer, [11] while that at smaller overvoltages has been usually attributed to the presence of oxide film on the electrode surface. [27,28] The obtained values for jo, see Table 1, is reasonable to compare with literature data for polycrystalline Ni and Co under the same experimental conditions. Thus jo of 1.7 × 10 -6 A cm -2 obtained for polycrystalline Ni is in a good accordance with the values of jo equal to of 1.1 × 10 -6 A cm -2 [29] and 1.8 × 10 -6 A cm -2 [30] reported for Ni.…”

Electrodeposition and Characterization of Alloys and Composite Materials

“…In almost all of the cited references in these two publications, the authors are either explaining the mechanism of codeposition or the influence of deposition parameters on the mechanical, tribological, corrosion, and magnetic properties of obtained composite structures. Recently, Cattarin and Musiani [124] published review of the studies carried out during the last decade on the electro-synthesis of oxide-matrix composite materials for electrocatalysis of the HER [125][126][127][128][129][130][131][132][133][134] and the oxygen evolution reaction [135][136][137][138][139][140][141][142][143][144][145] Taking into account that the review concerning oxide-matrix composite materials for electrocatalysis of the OER has already been published [124], in the next part of this chapter deposition of composite coatings containing metals and nonmetallic (oxide) particles as catalysts for the HER will be presented and discussed.…”

“…It was shown that the increase in electrochemical activity of the Ni-P + TiO 2 electrode towards the HER is due to both the presence of titanium oxides and the increase in the real surface area, as compared with the Ni-P electrode [134]. …”

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

“…The time constant associated to this semicircle, s 2 (CPE 2 À R 2 ), changes with overpotential. The HF semicircles is associated to the porosity of the electrode surface, [62][63][64][65] and the time constant related to this semicircles, s 1 (CPE 1 À R 1 ), does not signicantly change with the cathodic overpotential. According to the discussion presented above, the suitability of a specic electric equivalent circuit (EEC) to model the experimental data can be considered as a criterion to prescribe parameters to the specic processes (i.e.…”