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Electrolysis method for producing high-purity hydrogen peroxide and hydrogen with low cost

A technology of pure hydrogen peroxide and electrolysis method, which is applied in the field of preparing high-purity hydrogen peroxide and hydrogen by electrolysis, which can solve the problems of large power consumption, high cost of power-consuming electrode materials, and high production cost, and achieve power utilization efficiency High, improve the efficiency of electric energy utilization, reduce the effect of production costs

Active Publication Date: 2016-09-21
李国岭
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Problems solved by technology

Hydrogen production by electrolysis of water has high efficiency, mature technology, simple equipment, and high purity, but consumes a lot of electricity and has high production costs
[0004] Generally speaking, the biggest disadvantage of electrolytic production of hydrogen peroxide and hydrogen is the high cost of power consumption and electrode materials

Method used

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  • Electrolysis method for producing high-purity hydrogen peroxide and hydrogen with low cost

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Embodiment Construction

[0018] The method for producing high-purity hydrogen peroxide and hydrogen of the present invention adopts a pure-phase or doped bismuth vanadate single wafer with a crystal orientation of {111}, {110}, {100} or {010} as an anode of an electrolytic cell. The specific crystal planes of the pure phase or doped bismuth vanadate single crystal, such as {111}, {110}, {100}, {010}, can be realized on these crystal planes under the action of 2.1-2.8 V applied bias voltage Direct oxidation of water to generate H 2 o 2 , the reaction formula is 2H 2 O + 2h + = H 2 o 2 + 2H + , does not require such as SO 4 2- Plasma participation. However, other surfaces such as {001}, {101}, and {011} do not have the above characteristics, that is, under the condition of external bias, they can only selectively oxidize water to form O 2 , but cannot generate H 2 o 2 . Therefore, the present invention selects {111}, {110}, {100}, {010} as selective precipitation H 2 o 2 The active surf...

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Abstract

The invention provides an electrolysis method for producing high-purity hydrogen peroxide and hydrogen with low cost. The electrolysis method includes the steps that a pure-phase single crystal wafer or a single crystal wafer doped with bismuth vanadate serves as an anode of an electrolytic cell, wherein the crystal orientation of the single crystal wafer is {111} or {110} or {100} or {010}; and after alkaline electrolyte is added to the electrolytic cell, the bias voltage is externally applied to the anode and a cathode of the electrolytic cell, hydrogen peroxide is generated by the anode, and hydrogen is generated by the cathode. Compared with the prior art, by the adoption of the electrolysis method, expensive platinum is replaced with single crystal semiconductor oxide serving as the electrolytic anode, and production cost is lowered greatly. Compared with a platinum electrode of traditional electrolytic sulfuric acid or traditional electrolytic sulfate, by the adoption of the electrolysis method, the required initial voltage is smaller, and the electricity energy utilization efficiency is higher than that of the platinum electrode. By the adoption of the electrolysis method, the electrode material cost is lowered effectively, the electricity energy utilization efficiency is improved, meanwhile high-purity hydrogen peroxide and hydrogen are produced, and the electrolysis method has the important industrial application value.

Description

technical field [0001] The invention relates to a method for preparing hydrogen peroxide and hydrogen, in particular to a method for preparing high-purity hydrogen peroxide and hydrogen by electrolysis. Background technique [0002] Hydrogen peroxide, also known as hydrogen peroxide, is an important chemical raw material with non-polluting properties. It is widely used in printing and dyeing, papermaking, environmental protection, metallurgy, food, chemical synthesis, electronics, military industry, aerospace and other industries. The industrial production methods of hydrogen peroxide include electrolysis method, anthraquinone method, isopropanol method, cathodic anode reduction method, hydrogen-oxygen direct chemical method, etc. Among them, the electrolysis method was the main method of producing hydrogen peroxide before the 1990s, using metal platinum as the anode of the electrolytic cell, lead or graphite as the cathode, sulfuric acid, potassium sulfate or ammonium sulfa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25B1/00C25B1/02C25B11/04
CPCC25B1/00C25B1/02C25B11/04
Inventor 李国岭
Owner 李国岭
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