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Sustainion® X37-50 Grade RT is an anion exchange membrane with a dry thickness of 50 microns and is designed for use with a supporting electrolyte. It has been optimized for use in alkaline water electrolyzers and CO2 electrolyzers. The membrane will be shipped with an ethylene glycol plasticizer to prevent cracking. The plasticizer is designed to wash out during activation.
Please note that this membrane is currently only available in 23 cm x 28 cm sheets.
Anion conductivity of Sustainion X37 membrane for hydroxide ions, carbonate ions, and chloride ions are provided in the graph below.
For electrochemical CO2 reduction applications, the anion exchange membrane should be converted to the carbonate or bicarbonate form by treating the membrane initially with 0.1 to 0.5 M KOH or NaOH solution and then with 0.1 to 0.5 M water soluble carbonate or bicarbonate salt solutions (such as potassium carbonate or potassium bicarbonate that is dissolved in de-ionized water or distilled water). Fully submerging the anion exchange membrane into KOH or NaOH solution for 6 to 12 hours and then to the desired carbonate or bicarbonate salt solution for a period of 48-72 hours would be sufficient to fully convert the membrane into either carbonate or bicarbonate form. After rinsing the membrane (which is in the carbonate form) with deionized water or distilled water, it can be assembled inside the electrochemical setup for electrochemical CO2 reduction experiments. While the submersion of the membrane into the KOH or NaOH can be skipped, for such situations, a longer submersion time may be required in order to fully convert the membrane to carbonate or bicarbonate form. Initial conversion to OH- form significantly improves the carbonate ion exchange process due to expanded pore sizes.
Typical 5 - 10 business day lead time is to be expected.
***Buyer represents and warrants that all uses of Product will be for Buyer's own use, which means, in particular, that Buyer will not sell, distribute, or transfer Product, whether directly or indirectly, to any class of trade (each a Product Diversion ). Any Product Diversion shall be considered a material breach of this Purchase Contract. The Products contain chemical substances not on the Toxic Substances Control Act (TSCA ) inventory. Samples may be hazardous. Buyer represents and warrants that it will only use the samples for research and development purposes under the supervision of a technically qualified individual.
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