It is called an inhibitor.
surface area
The substance that slows down a chemical reaction is an inhibitor. Instead you could also call an inhibitor an anticatalyst.-anticatalyst `antee'katlist1. (chemistry) a substance that retards a chemical reaction or diminishes the activity of a catalyst
An inhibitor decreases the reaction rate
negative catalyst.
Chemical reactions can be either sped up or slowed down by catalysts.
Inhibitor~a material used to decrease the rate of reaction
An inhibitor is a substance that slows down or stops a chemical reaction by interfering with the reaction process. This can be achieved by binding to the reactants, blocking active sites on enzymes, or changing the pH of the environment to make the reaction less favorable.
Usually:decreasing concentrationlowering the temperaturesometimes lowering pressureremoving any catalyst
In general, a material that decreases the rate of a chemical reaction is called an inhibitor.
A factor that can slow down a chemical reaction is a low temperature, as lower temperatures reduce the kinetic energy of the reacting molecules, leading to fewer collisions and a slower rate of reaction.
inhibitor
The cold weather slows down the chemical reaction that goes on inside the battery.
Catalyst