> The team showed that as the catalyst brought the hydrogen and oxygen together to form hydrogen peroxide, it simultaneously produced a number of highly reactiv

> The team showed that as the catalyst brought the hydrogen and oxygen together to form hydrogen peroxide, it simultaneously produced a number of highly reactive compounds, known as reactive oxygen species (ROS), which the team demonstrated were responsible for the antibacterial and antiviral effect, and not the hydrogen peroxide itself. Interesting. I hope those aren't harmful to humans (or plants, or other animals). Also, from the high reactivity I suppose they might not stick around very long, which could be a good thing or a bad thing depending. It might be useful to be able to treat a large amount of water without leaving any long-lasting impurities, but on the other hand you might have to treat the water again if you want to store it any length of time... On the other hand, if a reactive thing doesn't have anything to react with, maybe it does persist for a long while?