In the catalytic reaction, the catalyst reacts with reactants, which changes the reaction path and reduces the activation energy of the reaction. . ?
The phenomenon that the chemical reaction rate is accelerated or slowed down due to the intervention of catalyst is called catalysis.
In the catalytic reaction, the catalyst reacts with reactants, which changes the reaction path, thus reducing the activation energy of the reaction, which is why the catalyst can improve the reaction rate. For example, chemical reaction A+B→AB needs activation energy E. After adding catalyst C, the reaction is divided into two steps, and the required activation energies are F and G, respectively, where both F and G are less than E. ..
Catalyst:
Catalyst, also known as catalyst, is a substance that changes the reaction rate without changing the total standard Gibbs free energy of the reaction.
A substance that can change (accelerate or slow down) the chemical reaction rate of other substances in a chemical reaction, but its quality and chemical properties have not changed before and after the reaction (it will change during the reaction) is called a catalyst.
There are many kinds of catalysts, which can be divided into liquid catalysts and solid catalysts according to their state. According to the phase state of the reaction system, it can be divided into homogeneous catalyst and heterogeneous catalyst; Can be applied to plants to accelerate their growth (increase and decrease);
The Swedish chemist Bezerius first discovered the catalyst. 1836, he also published a paper in the journal Yearbook of Physical Chemistry, and put forward the concepts of "catalysis" and "catalyst" used in chemical reactions for the first time. According to statistics, about 80%~85% of them have been used in chemical production, such as synthetic ammonia, sulfuric acid and nitric acid, and polymerization of ethylene and propylene.