Affiliation:
1. Gubkin University, Moscow, Russia
2. Kuban State University, Krasnodar, Russia
Abstract
Bilayer membranes consisting of a thick layer of a pure perfluorinated membrane MF-4SC and a thinner layer of the same membrane modified by halloysite nanotubes (HNTs), functionalized with platinum nanoparticles, are investigated. Membrane synthesis was carried out by casting from a polymer solution followed by drying. One of the samples revealed a weak asymmetry of diffusion permeability and the current–voltage characteristic. By using the physicochemical characteristics of monolayer membranes obtained earlier, the dependence of the diffusion permeability of the bilayer composite on the electrolyte concentration is described with satisfactory accuracy. The numbers of water transport and the selectivity of hybrid membranes, and their power characteristics in the membrane–electrode block of the fuel cell, were studied. The introduction of halloysite leads to a decrease in both parameters, and the subsequent addition of platinum compensates for the negative effect of halloysite addition: the maximum specific power becomes higher than that for the original/pure membrane, and the range of operating current densities widens. This makes it possible to predict the effective use of hybrid membranes based on MF-4SC and HNTs with platinum nanoparticles, not only as separating diaphragms in fuel cells and electromembrane devices, but also as promising catalytic systems.
Subject
Materials Chemistry,Surfaces, Coatings and Films,Process Chemistry and Technology
Cited by
5 articles.
订阅此论文施引文献
订阅此论文施引文献,注册后可以免费订阅5篇论文的施引文献,订阅后可以查看论文全部施引文献