The University of Tokyo and the University of Miyazaki (UOM) announced that researchers of the universities have made a system capable of water electrolysis using electricity generated by solar cells and succeeded in storing 24.4% of sunlight energy as hydrogen. In August 2015, an Australian research group achieved a sunlight-to-hydrogen energy conversion efficiency of 22.4% by using a similar principle. This time, the Japanese researchers realized an efficiency higher than that and achieved the world's highest-class efficiency. The energy conversion efficiency of a conventional hydrogen generation method using a photocatalyst is 10% or less, they said. Hydrogen Produced by Solar Electricity at World's Highest Efficiency - News - Solar Power Plant Business
