Disclaimer: TRY AT YOUR OWN RISK.
A real world use for this is a sterling engen, I haven't had the time to put that togeather but that's what I had inVisioned!
a qute from http://www.wisegeek.com/what-is-a-catalyst.htm
"A Catalyst is any substance that works to accelerate a chemical reaction. Catalysts can be organic, synthetic or metal. The process by which the catalyst speeds up or slows a reaction is called catalysis."
Have fun! Be safe! ~Russ