Kinetics of hydrogen evolution

Knowledge of the variation of electron transfer rate with electrode potential is important for the understanding of electrochemical reactions. The first experiments in this area were prompted by the observation that nitrobenzenes and aromatic carbonyl compounds are reduced in acid solution with little competition from the hydrogen evolution process. This is the case even though the electrode potential is more negative than the value calculated for the reversible evolution of hydrogen in the same solution. The kinetics of hydrogen evolution have been examined in detail. 

Chen L, Lasia A (1991) Study of the kinetics of hydrogen evolution reaction on nickel-zinc Alloy electrodes. J Electrochem Soc 138 3321-3328... 

The reaction kinetics of hydrogen evolution is particularly sensitive to trace amounts of noble metal impurities in the solution such as Cu and Au, which tend to deposit on the silicon surface [24, 25]. Figure 9 shows the effect of different metal deposits on the photocurrent of p-Si in a H2SO4 solution [26]. There appears to be a correlation between the effect of these metals on photocurrent and the exchange current density of hydrogen evolution on the metals. In addition to metal deposits, hydrogen evolution can also be catalyzed through deposition of a layer of metal... 

Rami A, Lasia A (1992) Kinetics of hydrogen evolution on Ni-Al alloy electrodes. J Appl Electrochem 22 376-382... 

Tab. 8 Relationships between the kinetics of hydrogen evolution and hydrogen permeation...

The kinetics of hydrogen evolution from MV radicals catalyzed by colloids of platinum and of gold are consistent with a second order dependence on catalyst concentration, and particle-particle collisions have been postulated to explain this. The likelihood of this phenomenon occuring and the inherent complexity of kinetic analysis in these systems have been critically analyzed. [284]... 

In contrast to the RHE, the DHE is not in equilibrium owing to the overpotential created by the enforced electrolysis current. However, the offset to equilibrium is small owing to the fast reaction kinetics of hydrogen evolution and it is constant if a constant electric current is applied. 

Divisek J (1986) Determination of the kinetics of hydrogen evolution by analysis of the potential-current and potential-coverage curves. J Electroanal Chem 214 615-632... 

Kinetics of hydrogen evolution on AZ91D or T4 alloy at different anodic current in 1 mol/L NaCI solution. 

Relationships between the Kinetics of Hydrogen Evolution and Hydrogen Permeation... 

The problem concerning the effect of a solvent on the kinetics of hydrogen evolution was discussed several times in the preceding chapters. It should be worthwhile to summarize the main features of this problem. 

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