Why can manganese dioxide be used as a catalyst for decomposing hydrogen peroxide to produce oxygen?
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Author : Lzh
Update time : 2023-02-05 13:39:27
What is manganese dioxide? Manganese dioxide, is insoluble in water, weak acid, weak base, nitric acid, cold sulfuric acid, and is dissolved in concentrated hydrochloric acid under heating to produce chlorine gas. It is used for the preparation of manganese salts, and also as an oxidant, rust remover, and catalyst. Manganese dioxide is an amphoteric oxide. When it meets the reducing agent, it shows oxidation. For example, manganese dioxide is heated to 1400K in the hydrogen gas stream to obtain manganese oxide. When manganese dioxide is reacted with concentrated hydrochloric acid, manganese chloride, chlorine gas and water are obtained.
Preparation of manganese dioxide Manganese chloride method reacts rhodochrosite with excessive hydrochloric acid to generate manganese chloride solution. After the reaction is completed, add lime to neutralize, control pH=4, add oxidant hydrogen peroxide to oxidize Fe2+to form iron hydroxide precipitation and remove it. The purified manganese chloride solution is added with manganese nitrate to prepare the electrolyte, so that the concentration of manganese chloride is 0.5~2.0 mol/L, and the concentration of HCl is 0.01~1.0 mol/L. Manganese nitrate with a content of 10%~15% can be added into the electrolyte, which can be electrolyzed at 85~95 ℃, This can solve the problem of air pollution and corrosion caused by the release reaction of trace chlorine in the electrolysis process. The fibrous manganese dioxide is obtained by electrolysis, and then the electrolytic manganese dioxide product is prepared by stripping, crushing, neutralizing, rinsing, filtering, drying and crushing the crude product.
Laboratory use of manganese dioxide Used as catalyst for hydrogen peroxide decomposition to produce oxygen: used as catalyst for heating the decomposition of potassium chlorate to produce oxygen. It reacts with aluminum powder to produce manganese. It is used as pigment, yellow glass, etc. It reacts with hot concentrated hydrochloric acid to produce chlorine. It reacts with molten caustic potassium (potassium hydroxide) in the air to produce potassium permanganate. In the decomposition reaction of potassium permanganate, manganese dioxide is used as the self-catalyst of potassium permanganate.
Price of manganese dioxide Manganese dioxide particle size and purity will affect the product's price, and the purchase volume can also affect the cost of manganese dioxide. A large amount of large amount will be lower. The price of manganese dioxide can be found on our company's official website.
Manganese dioxide supplier Luoyang Tongrun Nano Technology Co. Ltd. (TRUNNANO) Luoyang City, Henan Province, China, is a reliable and high-quality global chemical material supplier and manufacturer. It has more than 12 years of experience providing ultra-high quality chemicals and nanotechnology materials, including manganese dioxide, nitride powder, graphite powder, sulfide powder, and 3D printing powder. If you are looking for high-quality and cost-effective manganese dioxide, you are welcome tocontact usor inquire any time.
