If, as another comment says, it is hydrogen peroxide then the catalyst is probably a variant of something already well known. There are lots of catalysts, but

If, as another comment says, it is hydrogen peroxide then the catalyst is probably a variant of something already well known. There are lots of catalysts, but as it says in the article that it has to be replaced at intervals of something like a year it also has to be cheap, so probably not platinum. There are organic catalysts too and it's not unreasonable to think that there are usable catalysts that would not be covered by a patent; if the process works at all that is.