New record of hydrogen produced by direct solar division of watermiércoles, 18 julio 2018 An international team of researchers has managed to increase the efficiency of producing hydrogen from the direct solar division of water, up to a record level of 19 percent.They did this by combining a tandem solar battery of III-V semiconductors with a rhodium nanoparticle catalyst and a coating of crystalline titanium dioxide.Teams from the California Institute of Technology, the University of Cambridge, the Technische Universität Ilmenau and the Fraunhofer Institute for Solar Energy Systems ISE participated in the development work.Photovoltaic energy is one of the pillars of renewable energy supply systems, and sunlight is widely available all over the world, but not all day. One solution to deal with this fluctuating energy generation is to store sunlight in the form of chemical energy, specifically by using sunlight to produce hydrogen.