Electrolytic hydrogen evolution

Parsons R. 1958. The rate of electrolytic hydrogen evolution and the heat of adsorption of hydrogen. Trans Farad Soc 94 1053-1063. 

Trasatti S. 1972. Work function, electronegativity, and electrochemical behaviour of metals. IB. Electrolytic hydrogen evolution in acid solutions. Electroanal Chem Interfacial Electrochem 39 163-184. 

Fig. 18. Dependence of the exchange current density of electrolytic hydrogen evolution on the electronic work function. [C

Fig. 4. Activity of various intermetallic phases of Ni and Zr for electrolytic hydrogen evolution. The phase diagram is also shown. From ref. 83, by permission of Elsevier Sequoia.

Fig. 12. Activity of single crystal faces of a number of metals for electrolytic hydrogen evolution...

Fig. 5.40. Exchange currents for electrolytic hydrogen evolution vs. strengh of intermediate metal-hydrogen bond formed during electrochemical reaction itself. (M-H) from Krishtalik.

Ultrasonic waves of sufficient intensity reduce the overpotential during the evolution of gases like Hj, O2, and CI2 104). The most extensive studies in this direction have been on the electrolytic hydrogen evolution reaction. Overpotentials were reduced to below that observed with hydrogen gas stirring (Fig. 24). With ultrasonic waves, bubbles of... 

Calcium is produced by electrolysis in molten hydroxide electrolytes or by a thermal process. In the case of electrolysis in molten hydroxide electrolyte, hydrogen evolution is likely to be an important cathodic side reaction. 

So far, reactions between the corrosion products themselves and between the metal and the corrosion products have been ignored. It will be seen later that the formation of metal oxides and hydroxides via chemical reaction may be critical in determining the thermodynamics (section 10.2 and kinetics (section 10.3) of corrosion processes. Additionally, in the case of acid electrolytes, hydrogen evolution (reaction (10.9)) may result in the blistering of paint films or hydrogen embrittlement. 

Fig. 2.4 Current density for electrolytic hydrogen evolution versus strength of intermediate metal-hydrogen bond formed during the electrochemical reaction. Reprinted from S. Trasatti, /. Electroanal. Chem. 39 (1972) 163, with permission from Elsevier.

The cation corresponds to the metal dissolved in the amalgam. This result corresponds to the electrolytic hydrogen evolution at pure Ga in alkaline solutions. 

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