The hydrogen electrosorption process was examined in 6 M KOH on Pd binary alloys, containing Rh, Ru, and Pt. Pd-alloys were electrochemically deposited on Au substrate. The electrodes were subjected to activation procedure—hydrogen pretreatment procedure (HPP) at first in 0.5 M H₂SO₄ and then in 6 M KOH. It was noticed that it was possible to achieve comparable reversibility of hydrogen electrosorption process in acid and in concentrated base. The obtained values of the α→β phase transition potential, hysteresis extent, and maximum hydrogen absorption capacity show good agreement with the data from acidic medium. The observed kinetics of hydrogen electrosorption were strongly hindered in concentrated alkaline media, whereas the influence of the electrolyte on the thermodynamic functions of hydrogen absorption is less pronounced.

Graphical abstract

在含有Rh，Ru和Pt的Pd二元合金上，在6 M KOH中检查了氢的电吸附过程。将钯合金电化学沉积在Au基底上。首先在0.5 MH ₂ SO ₄中对电极进行活化程序-氢气预处理程序（HPP）然后加入6 M KOH 注意到有可能在酸和浓碱中实现可比的氢电吸附过程的可逆性。获得的α→β相变电势，滞后程度和最大氢吸收容量的值与酸性介质的数据吻合良好。在浓碱性介质中强烈阻碍了观察到的氢电吸附动力学，而电解质对氢吸收热力学功能的影响则不太明显。

图形概要