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Recipe for supercheap hydrogen: sunlight + water + rust

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Water and rust can make supereconomical hydrogen from sunlight, a team from École Polytechnique Fédérale de Lausanne (EPFL) reported recently. Researchers have been pursuing the conversion of solar energy into neutral-carbon-footprint hydrogen for more than four decades. EPFL joined the hunt in the 1990s through the work of Michael Grätzel, the inventor of the dye-sensitized solar cell. Working with a colleague at the University of Geneva, he invented the PEC (photoelectrochemical) tandem solar cell, a technique for producing hydrogen directly from water....Read full article

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    Published: February 2013
    Glossary
    nano
    An SI prefix meaning one billionth (10-9). Nano can also be used to indicate the study of atoms, molecules and other structures and particles on the nanometer scale. Nano-optics (also referred to as nanophotonics), for example, is the study of how light and light-matter interactions behave on the nanometer scale. See nanophotonics.
    Basic Sciencechemical energydye-sensitized solar cellÉcole Polytechnique Fédérale de Lausanneenergyenergy conversionEPFLEuropehydrogeniron oxideKevin SivulaMaterials & ChemicalsMichaël GrätzelnanonanostructuresNature PhotonicsoxygenPECphotoelectrochemicalResearch & Technologyrustsemiconductorssilicon oxidesolar hydrogen productionsunlightSwitzerlandtandem solar cellTech Pulsetitanium dioxideUniversity of Geneva

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