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A method for simultaneously producing hydrogen peroxide and hydrogen using a self-oxygenating double cathode device

A double cathode, hydrogen peroxide technology

Active Publication Date: 2018-08-28
TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, in some environments (such as groundwater), it lacks oxygen itself, and it is difficult to introduce air or pure oxygen at the same time, which makes it difficult for ordinary hydrogen peroxide generators to work

Method used

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  • A method for simultaneously producing hydrogen peroxide and hydrogen using a self-oxygenating double cathode device
  • A method for simultaneously producing hydrogen peroxide and hydrogen using a self-oxygenating double cathode device

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Experimental program
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Embodiment 1

[0025] in neutral Na 2 SO 4 In the solution, a power supply is used to supply power to the self-supplying hydrogen peroxide generator, the hydrogen evolution cathode adopts a constant current mode, and the constant current is 5mA, and the oxygen reduction cathode adopts a constant voltage mode, and the constant voltage is 0.4V (relative to the Ag / AgCl reference electrode, after Conversion, -0.21V relative to the standard hydrogen electrode potential), the oxygen evolution anode is used as a common counter electrode. Take 1mL of samples every 15min, then inject 1mL of electrolyte solution, and use the titanium potassium oxalate method to measure H 2 o 2 Solubility, such as figure 2 shown.

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Abstract

The invention provides a method for simultaneously producing hydrogen peroxide and hydrogen through an autonomous oxygen supply double-cathode device. The device used by the method is provided with two cathodes and one shared anode, that is, the oxygen reduction cathode, the hydrogen evolution cathode and the oxygen evolution anode. In the autonomous oxygen supply double-cathode device, oxygen produced by the shared anode is freely diffused to the oxygen reduction cathode, and the hydrogen peroxide is generated on the surface of a catalyst layer of the oxygen reduction cathode in a in-situ reduction mode; and the hydrogen produced by the hydrogen evolution cathode is freely diffused out of a solution system and collected. Compared with a traditional method for producing hydrogen peroxide through oxygen reduction, the method does not need to additionally supply oxygen to the oxygen reduction cathode, and the other product hydrogen is also produced. Compared with a traditional sulfuric acid electrolysis method for preparing hydrogen peroxide and hydrogen, the method can further produce the two kinds of products and does not need the strong acid environment or the re-hydrolysis step.

Description

technical field [0001] The invention belongs to the technical field of electrochemical synthesis technology, and in particular relates to a method for simultaneously producing hydrogen peroxide and hydrogen by using a self-oxygenation dual-cathode device. Background technique [0002] As an environmentally friendly oxidant, hydrogen peroxide is widely used in chemical synthesis, papermaking, environmental pollution control and other industries. Hydrogen peroxide is an important chemical raw material with an annual output of millions of tons. Its industrial production methods are various, such as: anthraquinone method, phosphoric acid neutralization method, hydrogen oxidation method, and electrolytic sulfuric acid method. Among them, the electrolytic sulfuric acid method can simultaneously prepare hydrogen peroxide and hydrogen through a two-step method, that is, firstly in a 60% sulfuric acid solution, the hydrogen ions are reduced at the cathode to generate hydrogen, and at...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C25B1/30
CPCC25B1/30
Inventor 张芳张海川李广贺张旭侯德义
Owner TSINGHUA UNIV
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