Efficient hydrogen generation from water using nanocomposite flakes based on graphene and magnesium
| Autor: | G. Coser, Kondo-Francois Aguey-Zinsou, Georg Pucker, Victor Micheli, Ruben Bartali, Michele Fedrizzi, Eki J. Setijadi, Matteo Testi, Nadhira Laidani, Luigi Crema, Giorgio Speranza, Roberto Canteri, Gloria Gottardi |
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| Rok vydání: | 2018 |
| Předmět: |
Nanocomposite
Materials science Hydrogen Renewable Energy Sustainability and the Environment Magnesium Graphene 020209 energy Oxide Energy Engineering and Power Technology chemistry.chemical_element 02 engineering and technology 7. Clean energy law.invention Metal chemistry.chemical_compound Fuel Technology chemistry Chemical engineering law visual_art 0202 electrical engineering electronic engineering information engineering visual_art.visual_art_medium Gravimetric analysis Hydrogen production |
| Zdroj: | Sustainable Energy & Fuels. 2:2516-2525 |
| ISSN: | 2398-4902 |
| DOI: | 10.1039/c8se00370j |
| Popis: | Water, through a metal–water reaction, is an appealing candidate to store and release hydrogen (H2), in particular as a portable, easy to use energy storage source. However, the release of hydrogen from the reaction of water with light metals can be violent or be inhibited by the formation of an oxide layer as is the case with magnesium (Mg). For this reason, we studied the use of graphene powder (Gr) as a nano-support to control the reactivity of Mg in water. Nanofilms and nanoparticles of Mg have been grown directly on graphene sheets inducing an increase of Mg surface area and the formation of metallic nanostructures that enhance the responsiveness of metal in water. We surprisingly observed that the water–Mg/Gr reaction happens at room temperature with impressive H2 production (the Mg/Gr hydrogen gravimetric density is 3%). Therefore, the hydrogen generated from water has been successfully used in a fuel cell proving that Mg/Gr is a promising material for on-demand H2 generation. |
| Databáze: | OpenAIRE |
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