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ABSTRACT ALTHOUGH the separation of the two hydrogen isotopes which occurs on electrolysis must be closely connected with their over-potentials, no measurement of these has been published. A
comparison of the deuterium over-potential with that of hydrogen can be of value in elucidating the general mechanism of hydrogen over -potential itself and, as part of an experimental
investigation of this, measurements have been made on deuterium. In order to eliminate errors due to the resistance of the electrolyte and to violent gas evolution, it is essential that very
low current densities should be used, and the electrolyte must be free from traces of oxygen or dissolved impurities. The over-potential measurements were made under conditions similar to
those described in earlier papers1, but it was a matter of some experimental difficulty to realise these with the small quantities of electrolyte available (1 c.c.). The results obtained
with a mercury cathode in a 0.2 _N_ sulphuric acid electrolyte are shown in Fig. 1. Access through your institution Buy or subscribe This is a preview of subscription content, access via
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* Learn about institutional subscriptions * Read our FAQs * Contact customer support REFERENCES * Bowden, _Proc. Roy. Soc._, A, 125, 446; 1929. Article ADS CAS Google Scholar * Bowden,
_Proc. Roy. Soc._, A, 126, 108; 1929. Article ADS Google Scholar * Farkas and Farkas, _Proc. Roy. Soc._, A, 146, 623; 1934. Article ADS CAS Google Scholar * Eyring and Topley, _J.
Chem Phys._, 2, 217; 1934. Bell and Wolfenden, _NATURE_, 133, 25; 1934. Article Google Scholar Download references AUTHOR INFORMATION AUTHORS AND AFFILIATIONS * Laboratory of Physical
Chemistry, Cambridge F. P. BOWDEN & H. F. KENYON Authors * F. P. BOWDEN View author publications You can also search for this author inPubMed Google Scholar * H. F. KENYON View author
publications You can also search for this author inPubMed Google Scholar RIGHTS AND PERMISSIONS Reprints and permissions ABOUT THIS ARTICLE CITE THIS ARTICLE BOWDEN, F., KENYON, H.
Over-Potential of the Hydrogen Isotopes. _Nature_ 135, 105 (1935). https://doi.org/10.1038/135105a0 Download citation * Issue Date: 19 January 1935 * DOI: https://doi.org/10.1038/135105a0
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