Sure, it’s under lab conditions but still a promising development. I’d love to know what kind of catalyst enables water to split on it’s own with only solar energy added. I’m not a huge fan of hydrogen power but I sure would be if a bottle of water could produce 30 kw without an overly expensive catalyst and simple/safe equipment for converting the hydrogen to power.
Otherwise I’m going to stick with high oil content algae. Nature is already doing a lot with photosynthesis. =)