Exciting progress of renewable energy from water!
'Although sunlight-driven water splitting is a promising route to sustainable hydrogen fuel production, widespread implementation is hampered by the expense of the necessary photovoltaic and photoelectrochemical apparatus. Here, we describe a highly efficient and low-cost water-splitting cell combining a state-of-the-art solution-processed perovskite tandem solar cell and a bifunctional Earth-abundant catalyst. The catalyst electrode, a NiFe layered double hydroxide, exhibits high activity toward both the oxygen and hydrogen evolution reactions in alkaline electrolyte. The combination of the two yields a water-splitting photocurrent density of around 10 milliamperes per square centimeter, corresponding to a solar-to-hydrogen efficiency of 12.3%. Currently, the perovskite instability limits the cell lifetime.'
Feed: Science: Current Issue
Posted on: Friday, 26 September 2014 10:00 AM
Author: Jingshan Luo
Subject: [Report] Water photolysis at 12.3% efficiency via perovskite photovoltaics and Earth-abundant catalysts
A pair of perovskite solar cells can power efficient hydrogen generation from water. [Also see Perspective by Hamann] Authors: Jingshan Luo, Jeong-Hyeok Im, Matthew T. Mayer, Marcel Schreier, Mohammad Khaja Nazeeruddin, Nam-Gyu Park, S. David Tilley, Hong Jin Fan, Michael Grätzel
View article...<http://www.sciencemag.org/content/345/6204/1593.summary?rss=1>
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