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- Kratzig, Andreas, et al.
(författare)
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RuS2 thin films as oxygen-evolving electrocatalyst: Highly oriented growth on single-crystal FeS2 substrate and their properties compared to polycrystalline layers
- 2014
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Ingår i: Physica Status Solidi. A: Applications and Materials Science. - : Wiley. - 1862-6300. ; 211:9, s. 2020-2029
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Tidskriftsartikel (refereegranskat)abstract
- The compound semiconductor RuS2, known as mineral laurite, has been investigated as a potential (photo) electrochemically active anode material for the oxygen evolution in the process of (photo) electrolytic water splitting. The contribution describes for the first time the preparation of RuS2 thin films deposited on (100)- and (111)-oriented FeS2 (pyrite) substrates using reactive magnetron sputtering. The epitaxial growth of 60 nm thick films was confirmed by X-ray diffractometry, texture measurements, and the evaluation of cross section transmission electron micrographs. By optical reflectance spectroscopy and Seebeck coefficient measurements a direct band gap of 1.9 eV and p-type conductivity could be determined. Due to the modest electrochemical stability of the epitaxial layers in electrochemical investigations, polycrystalline films of laurite were also deposited on Ti sheets and Si wafers. As a function of grain size, [S]:[Ru] ratio and grain orientation highest activity towards oxygen evolution was found when the conditions were fulfilled that the layer composition was close to stoichiometry and increased particle sizes showed a strong texture in the grains. Some structural and chemical properties argue for the (100) surface as catalytically active and stable layer compared to other surfaces. (C) 2014 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
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| 2. |
- Thapper, Anders, et al.
(författare)
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Artificial Photosynthesis for Solar Fuels – an Evolving Research Field within AMPEA, a Joint Programme of the European Energy Research Alliance
- 2013
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Ingår i: Green. - : Walter de Gruyter GmbH. - 1869-8778 .- 1869-876X. ; 3:1, s. 43-57
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Tidskriftsartikel (refereegranskat)abstract
- On the path to an energy transition away from fossil fuels to sustainable sources, the European Union is for the moment keeping pace with the objectives of the Strategic Energy Technology-Plan. For this trend to continue after 2020, scientific breakthroughs must be achieved. One main objective is to produce solar fuels from solar energy and water in direct processes to accomplish the efficient storage of solar energy in a chemical form. This is a grand scientific challenge. One important approach to achieve this goal is Artificial Photosynthesis. The European Energy Research Alliance has launched the Joint Programme “Advanced Materials & Processes for Energy Applications” (AMPEA) to foster the role of basic science in Future Emerging Technologies. European researchers in artificial photosynthesis recently met at an AMPEA organized workshop to define common research strategies and milestones for the future. Through this work artificial photosynthesis became the first energy research sub-field to be organised into what is designated “an Application” within AMPEA. The ambition is to drive and accelerate solar fuels research into a powerful European field – in a shorter time and with a broader scope than possible for individual or national initiatives. Within AMPEA the Application Artificial Photosynthesis is inclusive and intended to bring together all European scientists in relevant fields. The goal is to set up a thorough and systematic programme of directed research, which by 2020 will have advanced to a point where commercially viable artificial photosynthetic devices will be under development in partnership with industry.
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