(chemistry) a substance that makes a chemical reaction happen faster without being changed itself (Oxford)
catalyst (for something) a person or thing that causes a change (Oxford)
something that makes a chemical reaction happen more quickly without itself being changed (Cambridge)
I see my role as being a catalyst for change. (Oxford)
The high suicide rate acted as a catalyst for change in the prison system. (Cambridge)
Chlorine will act as a catalyst. (Oxford)
being a catalyst for change
suicide rate acted as a catalyst for change
act as a catalyst
Motivation
Stimulant
Hindrance
Prevention
Inhibitor
Catalysis