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Updated: Jun 19, 2025

Ion-Exchange Membranes for the Fabrication of Reverse Electrodialysis Device
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了解阳极催化剂导电性和负荷对催化剂层利用和离子交换膜水电解性能的影响

Melissa E Kreider1, Haoran Yu2, Luigi Osmieri3

  • 1Chemistry and Nanoscience Center, National Renewable Energy Laboratory, Golden, Colorado 80401, United States.

ACS catalysis
|July 25, 2024
PubMed
概括

在离子交换膜水电解 (AEMWE) 中优化阳极催化剂层是高效生产的关键. 催化剂加载和层均性显著提高了性能,特别是对于高导电性催化剂.

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Ion Exchange01:17

Ion Exchange

Ion exchange chromatography separates charged molecules from a solution by reversibly exchanging them with mobile, or 'active', ions associated with the oppositely charged stationary phase. This method can be used to separate ions, soften and deionize water, and purify solutions. The polymers comprising the ion-exchange column are high-molecular-weight and chemically stable polymers, crosslinked to be porous and essentially insoluble. They are also functionalized with either acidic or...
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Electrodeposition

Electrodeposition is a technique used to separate an analyte from interferents by electrochemical processes. Here, the analyte is a metal ion that can be deposited on an electrode immersed in the sample solution. The electrochemical setup consists of an anode and a cathode. When an electric current is applied to the setup, oxidation occurs at the anode. At the cathode, which consists of a large metal surface, metal ions undergo reduction and deposit onto the surface.
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Catalysis

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Membrane electrodes, also known as p-ion electrodes, use membranes that selectively interact with free analyte ions, generating a potential difference across the membrane. The resulting membrane potential, known as the asymmetry potential, is not zero even when analyte concentrations on both sides of the membrane are equal. The membrane's response is typically not selective to a single analyte but proportional to the concentration of all ions in the sample solution capable of interacting at...
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Factors Affecting Activity Coefficient

The extended Debye-Hückel equation indicates that the activity coefficient of an ion in an aqueous solution at 25°C depends on three partially interdependent properties: the ionic strength of the solution, the charge of the ion, and the ion size. 
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