Suntan the right organometallic molecules and you can make cheaper catalysts for hydrogen gas production.
Photochemical Route for Accessing Amorphous Metal Oxide Materials for Water Oxidation Catalysis, Smith, R.D.L., et. al., Science, 5 April 2013
Photochemical Route for Accessing Amorphous Metal Oxide Materials for Water Oxidation Catalysis, Smith, R.D.L., et. al., Science, 5 April 2013