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Lanthanide and actinide electrochemistry

A technology of lanthanides and actinides, which is applied in the field of electrochemistry of lanthanides and actinides, and can solve problems such as unrepeatable results and no modified electrodes

Active Publication Date: 2017-08-18
乔纳莱迪
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The reported results cannot be reproduced and there is no indication of modified electrodes

Method used

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  • Lanthanide and actinide electrochemistry
  • Lanthanide and actinide electrochemistry
  • Lanthanide and actinide electrochemistry

Examples

Experimental program
Comparison scheme
Effect test

Embodiment A

[0181] Example A : for TBABF in acetonitrile 4 The electrolyte was modified with a NAFION membrane (non-magnetic modification) for one working electrode, and the following scheme at a single working electrode allowed the separation of all lanthanides except Sm+Yb.

[0182]

Embodiment B

[0183] Example B : for TBABF in acetonitrile 4 One working electrode modified with NAFION membrane + magnetic modification in the electrolyte, the following scheme at a single working electrode allows separation of all lanthanides except Sm+Gd. (all separated at 30mV except step 2)

[0184]

Embodiment C

[0185] Example C : for TBABF in acetonitrile 4 Two working electrodes in the electrolyte, one with NAFION membrane (N) and one with NAFION membrane + magnetic modification (M), in the following scheme of two working electrodes (where one electrode is used at a time) allows separation of all.

[0186]

[0187] Using NAFION membranes with and without magnetic modification allowed separation of all five lanthanides.

[0188] These examples are not limiting or exclusive. They are possible scenarios based on the data in Table 1. Depending on the metal present, concentration and potential shifts available based on ligand, solvent and magnetic modification, other schemes may be more effective.

[0189] Separation may be able to be achieved by apparent potential shifts or by electron transfer kinetic constraints and chemical steps or both. Stronger magnets allow different potential shifts, allowing other separation schemes.

[0190] Larger offsets make separation more possibl...

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Abstract

Electrochemically reacting a lanthanide or actinide in solvent at a working electrode; wherein the solvent comprises an organic solvent such as acetonitrile which have a dielectric constant of at least three; wherein the solvent system further comprises an electrolyte; wherein the working electrode comprises an ionically conducting or permeable film such as a fluorosulfonate film; wherein at least one ligand such as triflate distinct from the ionically conducting or permeable film is present; wherein the ligand is chemically similar to a structure in the ionically conducting or ionically permeable film; and optionally wherein the electrochemical oxidation or reduction is carried out under the influence of a magnetic field which favorably enhances the reaction. Improved electrochemical methods, identification, and separation can be achieved. Also, an electrochemical device, wherein the device is adapted to employ the oxygen reduction reaction (ORR) at the cathode, wherein the cathode is magnetically modified, or the electrolyte comprises at least one lanthanide or actinide, or both.

Description

[0001] related application [0002] This application claims priority to US Provisional Application Serial No. 61 / 992,112, filed May 12, 2014, which is hereby incorporated by reference in its entirety. [0003] Federal Funding Statement [0004] This invention was made with government support under grants 0809745 and 1309366 awarded by the National Science Foundation. The government has certain rights in this invention. [0005] Background of the invention [0006] Electrochemistry is a powerful tool for many different types of industrial processes including, for example, separations, sensing, identification, elemental metal formation, energy generation and storage, catalysis, and more. However, the electrochemistry of rare earth elements (lanthanides and actinides) is generally a more difficult subject due to the unique properties of lanthanides and actinides. Lanthanide analysis is electrochemically limited by their standard potentials (in the range -1.99 and -3.90V v. NHE;...

Claims

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Application Information

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IPC IPC(8): H01M8/1016H01M12/06H01M12/08C25C1/22C25C7/02C25B1/00C25B9/08C25B9/19
CPCC25B1/00C25C1/22C25C7/02H01M8/1016H01M12/06H01M12/08H01M4/92H01M2008/1095C25B9/19Y02E60/50Y02E60/10B01J19/087C25D3/54
Inventor 乔纳·莱迪K.L.克诺歇
Owner 乔纳莱迪
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