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Apparatus for electrochemically synthesizing borohydride

A borohydride, electrochemical technology, applied in borane/diborane hydride, electrolysis process, electrolysis components, etc., can solve the problems of reduced current efficiency, low current efficiency, large footprint, etc. Current efficiency, high current efficiency, small footprint effect

Inactive Publication Date: 2009-04-15
HANERGY TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, due to the use of noble metal catalysts in this process, the current efficiency is reduced, and the traditional electrolyzer structure is not conducive to the contact between the reactant and the inside of the electrode, so the current efficiency is low. For this reason, the Chinese patent with the publication number CN1584122 proposes a three The electrolytic cell system is to divide the electrolytic cell into three mutually isolated chambers: the anode chamber, the cathode A chamber and the cathode B chamber, the anode chamber and the cathode A chamber are separated by a cation exchange membrane, and the cathode A chamber and the cathode B chamber are separated by a porous The cathode is separated. Although the device improves the current efficiency to a certain extent, it is expensive and occupies a large area

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  • Apparatus for electrochemically synthesizing borohydride
  • Apparatus for electrochemically synthesizing borohydride

Examples

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Embodiment 1

[0030] Such as figure 1 Shown, a kind of electrolysis prepares the device of sodium borohydride, comprises the quartz glass electrolytic cell 1 that cathode chamber 2 and anode chamber 3 constitute, and wherein cathode chamber 2 and anode chamber 3 are separated by porous alumina ceramic sheet 12; Described The upper part of the cathode chamber 2 is provided with a hydrogen outlet 5 and NaBO 2 and NaAlO 2 feed port 6, the side of the cathode chamber is provided with a hydrogen inlet 4, and the top of the anode chamber is provided with an oxygen outlet 7; the aluminum cathode 8 and the graphite anode 9 are respectively located inside the cathode chamber 2 and the anode chamber 3, with the electrolyte interface as limit, the aluminum cathode 8 is divided into upper and lower parts, the lower half 8a is a porous foam structure, and the upper half 8b is a solid structure, and Na is added to the cathode chamber 2 and the anode chamber 3 at the same time 3 AlF 6 and NaAlF 4 (SAF...

Embodiment 2

[0032] Such as figure 1 Shown, a kind of device of preparing potassium borohydride by electrolysis comprises the alumina ceramic electrolytic cell 1 that cathode chamber 2 and anode chamber 3 constitute, and wherein cathode chamber 2 and anode chamber 3 are separated by porous silicon dioxide ceramic sheet 12; The top of the cathode chamber 2 is provided with a hydrogen outlet 5 and a KBO 2and KAlO 2 Feed port 6, the side of the cathode chamber is provided with hydrogen inlet 4, the top of the anode chamber is provided with oxygen outlet 7; iron cathode 8 and graphite anode 9 are respectively located in the inside of cathode chamber 2 and anode chamber 3, simultaneously to the cathode chamber 2 and anode chamber 3 by adding K 3 AlF 6 、K 7 B 3 o 8 and NaAlF 4 , AlF 3 and CaF 2 , KBO 2 and KAlO 2 The solution is fed into the cathode chamber 2 through the feeding port 6, hydrogen gas is passed into the cathode through the pipeline 11, the electrolysis temperature is 50...

Embodiment 3

[0034] Such as figure 1 Shown, a kind of device of electrolytically preparing lithium borohydride comprises the alumina ceramic electrolytic cell 1 that cathode chamber 2 and anode chamber 3 constitute, wherein cathode chamber 2 and anode chamber 3 are separated by porous magnesia ceramic sheet 12; The upper part of the cathode chamber 2 is provided with a hydrogen outlet 5 and a LiBO 2 and LiAlO 2 The feeding port 6, the side of the cathode chamber is provided with a hydrogen inlet 4, the top of the anode chamber is provided with an oxygen outlet 7; the graphite cathode 8 and the graphite anode 9 are respectively located in the cathode chamber 2 and the inside of the anode chamber 3. 2 and anode compartment 3 with Li 7 B 3 o 8 and LiAlF 4 , AlF 3 and CaF 2 , LiBO 2 and LiAlO 2 The solution is fed into the cathode chamber 2 through the feeding port 6, and the hydrogen gas is passed into the cathode through the pipeline 11. The electrolysis temperature is 600°C, the vo...

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Abstract

The invention discloses a device for electrochemically synthesizing borohydride. The device comprises an electrolytic cell which is composed of a cathode chamber and an anode chamber that are separated by porous ceramic plates; wherein, a cathode and an anode are respectively arranged in the interior of the cathode chamber and anode chamber; a hydrogen inlet is arranged at the side of the cathode chamber which is divided into two parts, wherein the lower part (8a) is a porous foam type structure and the upper part (8b) is an entity structure; the hydrogen inlet is directly connected with the interior of the cathode through a pipeline(11); and residual hydrogen is derived out through a hydrogen outlet (5) and enters the pipeline (11) through a pipeline (10) and a pressure pump (13). The device has the advantages of simple structure, higher current efficiency, smaller occupation area and the like. Besides, the cathode adopts the lower part of the porous foam type structure, which speeds up the hydrogen diffusion, increases the reaction area and improves the current efficiency.

Description

technical field [0001] The invention relates to an electrochemical synthesis device, in particular to a device for electrochemical synthesis of borohydride, which belongs to the field of fuel cell hydrogen sources. Background technique [0002] Today, fuel cells are highly valued by various countries, and are considered to be the first choice for efficient and clean power generation devices in the 21st century. At present, the main problem restricting the development of fuel cells is hydrogen storage, and the commonly used hydrogen storage methods have low hydrogen storage energy. Borohydride is a material with high hydrogen storage content. It can not only catalyze hydrolysis to release hydrogen as a high-capacity, high-purity hydrogen source material, but also directly electrochemically serve as a high-capacity negative electrode material. [0003] Recently, the chryler group of the United States and the H-Gene Tech.Alliance of Japan are developing a new type of fuel cell ...

Claims

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Application Information

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IPC IPC(8): C25B1/00C01B6/21
Inventor 肖钢侯晓峰李洲鹏刘宾虹
Owner HANERGY TECH
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