Simply by dropping the solar cell in water and exposing it to light, O
2 bubbles begin streaming off the side coated with a cobalt borate catalyst, and H
2 bubbles begin streaming off the other side coated by a nickel-molybdenum-zinc alloy catalyst.
The cell was developed by MIT's Daniel G. Nocera and SunCatalytix. SunCatalytix was
purchased by Lockheed Martin in 2014.
Electrofuels, C&EN, 89, page 36 (2011)