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Course of Applied Chemistry Department of Chemistry and Biotechnology Graduate School of Engineering Tottori University		[Japanese] [English]

A catalyst accelerates rate(s) of chemical reaction(s). If you see a dilute solution of H₂O₂, you will observe slow formation of oxygen bubbles by the reaction (decomposition) of 2H₂O₂ -> 2H₂O + O₂. If you put a particle of MnO₂, the formation of bubble must become very fast. MnO₂ looks unchanged, and in a fact, you will observe no change by physical and chemical analysis. Therefore, it is speculated that just a contact between the catalyst and reactant enhances the rate of chemical reaction. However, just the presence of catalyst beside the reactant does not enhance the rate of reaction. As explained here, the catalyst joins the reaction, and recovers its form after the reaction.

Catalysis is very complex and just like as designed wisely by nature. Both of organic and inorganic substances act, and atoms play their roles on a solid surface for catalysis. Catalysts join to chemical reactions. Catalysis is similar to the role of excellent teacher on the development of a child. An excellent teacher has deep relation with the activity of child. He/she must not be consumed like food, but can again contribute to next child. However, the teacher should not be the classroom, namely, vessel. He/she deeply relates with the child to greatly enhance the development to one certain direction, and this decides the future of child. Like this teacher, catalysts join the chemical reaction.