Question

Define promoter.

Answer 1

Promoter - A substance that enhances the rate of reaction by increasing the efficiency of the catalyst.

Example - In the production of ammonia gas Molybdenum (Mo) acts as a promoter which enhances the activity of catalyst Iron (Fe).

$$\begin{gathered} {\mathrm{N}}_2+{\mathrm{H}}_2\underset{\mathrm{Mo}(\mathrm{promoter})}{\overset{\mathrm{Fe}\left(\mathrm{catalyat}\right)}{\to }}2{\mathrm{NH}}_3+\mathrm{heat} \\ \mathrm{Nitrogen}\mathrm{Hydrogen}\mathrm{Ammonia}\mathrm{energy} \end{gathered}$$