ScienceDaily (Oct. 28, 2011) — A team of researchers at MIT has found one of the most effective catalysts ever discovered for splitting oxygen atoms from water molecules
I found this from the comment section of the Nuclear Ammonia post referred to in an earlier post. Here's a reference to a pdf file which describes Nuclear Ammonia as a killer app. The final cost over a 30 year period would not be insubstantial. However, it should be kept in mind that the cost of what we are doing now may be an order of magnitude higher. In other words, this would be cost effective, not to mention, cleaner.
The Thorium technology and ammonia ideas are not new. Thorium fuel cycles were experimented with decades ago. The same is true of the an ammonia powered auto, in which an updated version can be seen in this video below: