Kinetics of hydrogen absorption by porous nickel in an aqueous sodium hydroxide solution

Research paper by M. V. Ulitin, Yu. E. Romanenko, O. V. Lefedova

Indexed on: 05 May '12Published on: 05 May '12Published in: Russian Journal of Physical Chemistry A


Kinetic studies of hydrogen absorption by porous nickel catalyst establish that there are three regions on kinetic curves of the process differing in their regularities of adsorption. The dependence of the observed rate of hydrogen absorption on the adsorbate amount is formally described by a first order kinetic equation, and the absorption rate constants corresponding to distinct parts of the kinetic curve differ by 1–2 orders of magnitude. The obtained data are explained using the concept that hydrogen adsorption on nickel active centers proceeds with three forms of adsorption.