![Electrochemically induced mass exchange between electrolyte and Fe(bpy)"3^2^+-impregnated Nafion membrane [An article from: Analytica Chimica Acta]](https://www.ebooknetworking.net/books/B00/0RR/bigB000RR3JLI.jpg)
Electrochemically induced mass exchange between electrolyte and Fe(bpy)"3^2^+-impregnated Nafion membrane [An article from: Analytica Chimica Acta]
Book Details
Author(s)S. Nagasaka, M. Harada, T. Okada
PublisherElsevier
ISBN / ASINB000RR3JLI
ISBN-13978B000RR3JL3
AvailabilityAvailable for download now
Sales Rank99,999,999
MarketplaceUnited States 🇺🇸
Description
This digital document is a journal article from Analytica Chimica Acta, published by Elsevier in 2004. The article is delivered in HTML format and is available in your Amazon.com Media Library immediately after purchase. You can view it with any web browser.
Description:
The mass exchange properties of a Fe(bpy)"3^2^+-impregnated Nafion membrane have been investigated with spectrophotometry, electrochemistry, and quartz microbalance measurements (QCM). When all of the anionic charges in the Nafion membrane are neutralized by Fe(bpy)"3^2^+, the membrane becomes water-repellent. Poorly hydrated tetraethylammonium ion more effectively replaces the complex in this membrane than well-hydrated cations such as Na^+, K^+, and Ca^2^+. Poorly hydrated anions (e.g. ClO"4^-) also facilitate the cation-exchange leaching of Fe(bpy)"3^2^+ from the membrane. When this membrane is spread over the surface of an electrode, the mass transfer is influenced by the electrical potential applied to the electrode. Applying positive potential facilitates the electrolyte invasion into the membrane, and thereby the leaching of Fe(bpy)"3^2^+ due to cation-exchange is enhanced. QCM measurements have revealed that cations partitioned into the membrane are excluded out of the membrane by the oxidation of Fe(bpy)"3^2^+, and that cations are repartitioned into the membrane by the cathodic potential sweep.
Description:
The mass exchange properties of a Fe(bpy)"3^2^+-impregnated Nafion membrane have been investigated with spectrophotometry, electrochemistry, and quartz microbalance measurements (QCM). When all of the anionic charges in the Nafion membrane are neutralized by Fe(bpy)"3^2^+, the membrane becomes water-repellent. Poorly hydrated tetraethylammonium ion more effectively replaces the complex in this membrane than well-hydrated cations such as Na^+, K^+, and Ca^2^+. Poorly hydrated anions (e.g. ClO"4^-) also facilitate the cation-exchange leaching of Fe(bpy)"3^2^+ from the membrane. When this membrane is spread over the surface of an electrode, the mass transfer is influenced by the electrical potential applied to the electrode. Applying positive potential facilitates the electrolyte invasion into the membrane, and thereby the leaching of Fe(bpy)"3^2^+ due to cation-exchange is enhanced. QCM measurements have revealed that cations partitioned into the membrane are excluded out of the membrane by the oxidation of Fe(bpy)"3^2^+, and that cations are repartitioned into the membrane by the cathodic potential sweep.
