Electrolytic cell for directly producing hydrogen peroxide synchronously by cathode and anode

Abstract

The invention discloses an electrolytic cell for directly producing hydrogen peroxide synchronously by a cathode and an anode, the electrolytic cell comprises the anode and the cathode, the anode is arranged on the cell wall of the electrolytic cell, the anode comprises a semiconductor oxide layer and a bearing substrate, and the semiconductor oxide layer covers a conductive film of the bearing substrate; the cathode comprises a carbon-based material and a multi-channel carrier, the carbon-based material is embedded in the multi-channel carrier, and oxygen is uniformly diffused to the surface of the carbon-based material through channels in the multi-channel carrier. Under the condition that visible light irradiates the anode or bias voltage is directly applied, two-electron water oxidation reaction occurs in the anode chamber to generate hydrogen peroxide, and two-electron oxygen reduction reaction occurs in the cathode chamber to generate hydrogen peroxide. The method has the beneficial effects that the electrolytic bath fully combines the advantages of an oxygen cathode reduction method and a bismuth vanadate method electrolytic bath, realizes synchronous direct production of hydrogen peroxide by the cathode and the anode, greatly improves the added value of products, improves the utilization efficiency of electric energy, and has important industrial application value.

Description

technical field [0001] The invention relates to the technical field of electrolysis devices for producing hydrogen peroxide, in particular to an electrolytic cell for directly producing hydrogen peroxide by using the cathode and anode of oxygen cathode reduction reaction and water anode oxidation reaction synchronously. Background technique [0002] Hydrogen peroxide aqueous solution, commonly known as hydrogen peroxide, is an important chemical raw material with clean and non-polluting properties. It is widely used in printing and dyeing, papermaking, environmental protection, food, chemical synthesis and semiconductor industries. Hydrogen peroxide is usually divided into industrial grade, food grade, reagent grade and electronic grade. Among them, ultra-clean and high-purity electronic grade hydrogen peroxide is one of the indispensable key materials in the microfabrication process of semiconductor technology. It is mainly used in chip manufacturing. In the process links s...

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Problems solved by technology

Among them, the water anodic oxidation method is an electrolytic method, and its chemical reaction equation is 2H 2 O → H 2 o 2 + H 2 , which has the advantage of high product purity, and its disadvantages of low selectivity and low current efficiency (according to the literature: Xinjian Shi et al ., Nature Communications, 2017, 8: 701)

The bismuth vanadate method is a water anodic oxidation method based on bismuth vanadate single crystal as the core catalyst, which can maximize the catalytic activity and selectivity of the water anodic oxidation reaction. Its advantages are high current efficiency, low cost, and high product purity. The disadvantage is that the added value of hydrogen precipitated at the cathode is low and inconvenient to store and utilize (according to the literature: the patent name is "An electrolysis method for producing high-purity hydrogen peroxide and hydrogen at low cost", the application number is 201610567960.5, and the inventor is Li Guoling's China Invention patent application; the title is "An electrolysis method for producing hydrogen peroxide and hydrogen at low cost using solar energy", the application number is 201610567956.9, and the inventor is Li Guoling's Chinese invention patent application)

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