Original article from PHYSORG:

“Engineers at Washington University in St. Louis have developed a unique photocatalytic cell that splits water to produce hydrogen and oxygen in water using sunlight and the power of a nanostructured catalyst.

The group is developing novel methodologies for synthesis of nanostructured films with superior opto-electronic properties. One of the methods, which sandwiches three semiconductor films into a compact structure on the nanoscale range, is smaller, more efficient and more stable than present photocatalytic methods, which require multiple steps and can take from several hours to a day to complete.

The discovery provides a new, low-cost and efficient option for hydrogen production and can be used for a variety of distributed energy applications.”

Wow, this is as important as making gasoline from CO2 with solar power. Imagine a hybrid car runs with hydrogen fuel cells and gas that its CO2 emission is collected and turned into gas internally and power the car again.