Showing papers on "Nickel boride published in 1970"
140 citations
01 Jan 1970
TL;DR: In this article, the polarization curves of hydrazine electrodes were measured with respect to the porous structure of the electrodes, and it was shown that the increase in temperature has a favorable influence on both the reduction of oxygen (desirable reaction) as well as the oxidation of Hydrazine (side reaction) so that no major improvement of their working ability was achieved.
Abstract: The activities of several catalysts used for oxidizing hydrazine were tested by measuring the polarization curves of hydrazine electrodes. Nickel boride prepared by reducing nickel salts with sodium borohydride proved to be the most suitable one. This catalyst, however, is easily deactivated by hydrogen peroxide ions formed as an intermediate in the reduction of oxygen on oxygen electrodes. The rate of gas evolution on loaded and unloaded electrodes was measured in a specially designed vessel and the results are discussed with respect to the porous structure of the electrodes. Investigation of carbon oxygen electrodes in fuel-containing electrolyte (12 N KOH + 1 m N2H4) proved that the increase in temperature has a favourable influence on both the reduction of oxygen (desirable reaction) as well as the oxidation of hydrazine (side reaction) so that no major improvement of their working ability was achieved.