Abstract
Hydrogen peroxide is a chemical used in oxidation reactions, treatment of various inorganic and organic pollutants, bleaching processes in pulp, paper and textile industries and for various disinfection applications. It is a monopropellant, which, when purified, is self-decomposing at high temperatures or when a catalyst is present. Decomposing to yield only oxygen and water(disproportionation), hydrogen peroxide is one of the cleanest, most versatile chemicals available. The catalytic decomposition of hydrogen peroxide allows the use of various catalysts that will increase the rate of decomposition. Comparison and description of the most commonly used catalysts were presented in this review.
Highlights
Hydrogen peroxide is a commonly used chemical compound with the formula H2O2
Diluted solutions of H2O2 can be safely decomposed in the presence of proper enzymes known as catalase peroxidases, which are possessed by all aerobes
It is worth mentioning that the iron oxide in the form of aqueous goethite is suitable for catalysing hydrogen peroxide decomposition even in highly concentrated solutions
Summary
Hydrogen peroxide is a commonly used chemical compound with the formula H2O2. In pure liquid form, it has a distinctive pale blue colour [1]. Other factors that affect the rate of reaction are temperature, pressure, concentration of solution, type, activity and area of active catalytic surface of the catalyst, exposure to direct sunlight and presence of inhibitors [10]. Reaction of decomposition of hydrogen peroxide is very slow in moderate temperatures without the presence of a catalyst [11]. Regeneration has one additional effect for the catalyst – it develops a surface of metal and increases the amount of active centres It is crucial for new silver, where surface is undeveloped and smooth, which results in limited decomposition efficiency [17]. During the reaction of hydrogen peroxide decomposition catalysed by silver, four different reaction zones can be noticed, each dominant for a range of bulk solution temperatures. Due to the heterogeneous nature of the process of decomposition of H2O2catalysed by silver exact mechanism of this reaction is still unknown, probably it is based on a radical mechanism
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