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Solar hydrogen: Photoanodes made of alpha-SnWO4 promise high efficiencies


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IMAGE: TEM-Image of a α-SnWO4 film (green) coated with 20 nm NiOx (pink). At the interface of α-SnWO4 and NiOx an additional interfacial layer can be observed.
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Credit: HZB
Hydrogen is an important factor in a sustainable energy system. The gas stores energy in chemical form and can be used in many ways: as a fuel, a feedstock for other fuels and chemicals or even to generate electricity in fuel cells. One solution to produce hydrogen in a climate-neutral way is the electrochemical splitting of water with the help of sunlight. This requires photoelectrodes that provide a photovoltage and photocurrent when exposed to light and at the same time do not corrode in water. Metal oxide compounds have promising prerequisites for this. For example, solar water splitting devices using bismuth vanadate (BiVO4) photoelectrodes achieve already today ~8 % solar-to-hydrogen efficiency, which is close to the material s theoretical maximum of 9 %. ....

Patrick Schnell , Institute For Solar Fuels , International Research School , Fatwa Abdi , Solar Fuels , Research School , பேட்ரிக் ஶ்நெல் , நிறுவனம் க்கு சூரிய எரிபொருள்கள் , சர்வதேச ஆராய்ச்சி பள்ளி , ஃபத்வா அப , சூரிய எரிபொருள்கள் , ஆராய்ச்சி பள்ளி ,