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Three-chamber two-membrane electrolytic cell for preparing sodium borohydride through direct-current electrolytic reduction

A sodium borohydride, direct current electrolysis technology, applied in the electrolysis process, electrolysis components, cells, etc., can solve the problem that the electrolysis cell device cannot efficiently improve the electrolysis yield of NaBH, so as to improve the probability of electrocatalytic reduction, reduce the impact, and improve the electrolysis efficiency effect

Active Publication Date: 2021-06-18
XUZHOU NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] For the above-mentioned existing electrolyzer device cannot efficiently improve NaBH 4 In order to solve the problem of electrolysis yield, the present invention proposes an electrolytic cell device with two-membrane and three-chamber structure for preparing sodium borohydride by direct current electrolysis

Method used

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  • Three-chamber two-membrane electrolytic cell for preparing sodium borohydride through direct-current electrolytic reduction
  • Three-chamber two-membrane electrolytic cell for preparing sodium borohydride through direct-current electrolytic reduction
  • Three-chamber two-membrane electrolytic cell for preparing sodium borohydride through direct-current electrolytic reduction

Examples

Experimental program
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Effect test

Embodiment 1

[0034] Add the NaOH solution of 50ml 1mol / L in two anode chambers of electrolyzer, the NaOH solution of 50ml 1mol / L and the sodium metaborate mixed solution of 0.5mol / L are added in cathode chamber 1.

[0035] DC electrolysis at normal temperature and pressure, the electrolysis voltage is 4v, to test the sodium borohydride concentration of the solution after electrolysis for 30, 90, 120, 150, 180, 210, 240, 270, and 300 minutes respectively under this voltage; Tested by voltammetry, the test voltage range is -1~1v, and the scanning speed is 0.05v / s. Figure 4 It can be seen that the peak current is the largest at 270 minutes of electrolysis, which is 14.06×10 -4 A·cm -2 , at this time the concentration of sodium borohydride is the highest.

Embodiment 2

[0040] The electrolyte concentration is the same as in Example 1.

[0041] DC electrolysis at normal temperature and normal pressure, the electrolysis voltage is 1.5, 4v respectively, and the sodium borohydride concentration of the solution after electrolysis for 30 minutes is tested at each voltage; the test method is to use the gold electrode as the cathode and use the cyclic voltammetry test. The test voltage range is -1~1v, the scanning speed is 0.05v / s, by Figure 7 It can be seen that the peak current is the largest when the electrolysis voltage is 1.5v, and the peak current density is 14.5×10 -4 A·cm -2 , at this time the concentration of sodium borohydride is the highest.

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Abstract

The invention discloses a three-chamber two-membrane electrolytic bath for preparing sodium borohydride by direct-current electrolytic reduction. The electrolytic bath comprises a cathode chamber, an anode chamber A and an anode chamber B. The cathode chamber is arranged between the anode chamber A and the anode chamber B and is separated from the anode chambers on two sides through cation exchange membranes. The two-membrane three-chamber electrolytic bath structure adopted by the invention can form electric fields which are uniformly distributed on the left side and the right side of the cathode, so that the influence of the electric fields on metaborate ion electromigration is reduced, the electrolytic catalytic reduction area of metaborate ions and the cathode is increased, and the electrolytic efficiency is improved.

Description

technical field [0001] The invention belongs to the field of hydrogen storage material manufacturing, and in particular relates to a three-chamber and two-membrane electrolytic cell for preparing sodium borohydride through direct-current electrolytic reduction. Background technique [0002] Sodium borohydride is an excellent hydrogen storage material, its hydrogen storage density can reach 10.8 wt%, the regeneration product is pollution-free, and the purity of hydrogen release is high. It is also an ideal hydrogen source for fuel cells. (PEMFC) and direct hydroboration fuel cell (DBFC) systems are promising candidates for hydrogen storage, but their development is restricted by problems such as high cost, high hydrogen production cost, difficult regeneration, and the need for noble metal catalysts. [0003] At present, the preparation methods of sodium borohydride include industrial synthesis method, direct reduction method and so on. Compared with other methods, the prepar...

Claims

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Application Information

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IPC IPC(8): C25B1/00C25B9/19
CPCC25B1/00
Inventor 魏永生付文英司司刘妍陈佳琪韦露赵新生
Owner XUZHOU NORMAL UNIVERSITY