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Fully Solar-Powered Uninterrupted Overall Water-Splitting Systems
摘要： Extensive research efforts have been recently devoted to the development of self-driven electrocatalytic water-splitting systems to generate clean hydrogen chemical fuels. Currently, self-driven electrocatalytic water-splitting devices are powered by solar cells, which operate intermittently, or by aqueous batteries, which deliver stored electric power, leading to high operating costs and environmental pollution. Thus, a fully solar-powered uninterrupted overall water-splitting system is greatly desirable. Here, the solar cells, stable output voltage of 1.75 V Ni–Zn batteries, and high efficiency zinc–nickel–cobalt phosphide electrocatalysts are successfully assembled together to create a 24 h overall water-splitting system. Specifically, the silicon-based solar cells enable the charging of aqueous Ni–Zn batteries for energy storage as well as providing sufficient energy for electrocatalysis throughout the day; in addition, the high-capacity Ni–Zn batteries offer a steady output voltage for overall water-splitting at night. Such an uninterrupted solar-to-hydrogen system opens up exciting opportunities for the development and applications of renewable energy.
关键词： uninterrupted,solar-powered,water-splitting system,aqueous rechargeable batteries
更新于2025-09-23 15:23:52
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Pyrite FeS2 nanostructures: Synthesis, properties and applications
摘要： Nanostructured metal sul?des have been widely studied due to their unique electrical, chemical, magnetic and optical properties and the promising application prospects. Pyrite iron disul?de (FeS2) receives high attention because of its suitable band gap, exceptionally high optical absorption coe?cient in the visible region and the advantages of earth abundance, nontoxicity and low fabrication cost. It exhibits promising applications in photovoltaics, rechargeable batteries, dye-sensitized solar cells, photodetectors, photocapacitors and photo-catalysis. This paper provides a comprehensive review of the FeS2 nanostructures, including the preparation methods, properties and applications. We begin from a short background of FeS2, describing the structure, fundamental physical, chemical and electronic properties. Then a detailed investigation of FeS2 nanostructures with di?erent shapes and the corresponding methods are described. Finally, the application prospects of FeS2 nanostructures in plentiful novel devices are introduced.
关键词： Rechargeable batteries,FeS2,Nanostructure,Photovoltaic,Synthesis
更新于2025-09-09 09:28:46