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The present work was aimed at the development of a straight-forward method for a multicomponent membranes synthesis, as well as study of electrochemical and ion transport properties of the synthesized membranes. It was shown that introduction of silica and phosphotungstic acid (PTA) into a Nafion membrane composition slightly affects the membrane proton conductivity; however it results in a significant decrease of the ferric ion transfer through the membrane. The addition of PTA was found to result in an increase in the membrane permeability to ferric ions. The membranes converted into K+-form was showed to have a high stability to PTA leaching.
composite membrane, silica, phosphotungstic acid, proton conductivity, ferric ions diffusion coefficient.
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