Is there any catalyst or substance that can do this?
Hmmm I seem to remember that in my time the boiling point was defined as the boiling temperature of the pure liquid at one atmosphere (or sea level).
I suppose the question is meant to be understood as "lower boiling point after something has been added all other things being equal". But it is as vague as a question can be.
As Borek wrote, is impossible to lower the BP of water without significant amounts of another chemical (so, "catalythic" amounts are excluded).
Here there are some values of BP of mixes water + other liquid:
From these data you see how is difficult to lower the BP of water: if you want to use little amounts of chemicals, you could, e.g. use 9% benzyl alcohol, but the BP lowers of 0.1°C only.; or you could use cyclohexanol and you lower the BP of 2.2°C, but you have to use at at 20%...