Water splitting for hydrogen chemisorption in graphene oxide dynamically evolving to a graphane character lattice
10.1016/j.carbon.2019.06.087
Inclou dades d'ús des de 2022
Cita com:
hdl:2117/174201
Tipus de documentArticle
Data publicació2019-11-01
Condicions d'accésAccés obert
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Reconeixement-NoComercial-SenseObraDerivada 4.0 Internacional
Abstract
Graphane offers a safe and high capacity hydrogen storage. Unfortunately, production of graphane directly from its parent material graphene requires breaking the extended p bond, implying either harsh chemical environments or highly energetic plasmas. In here, we propose to use graphene oxide (GO) to initially have the lattice irregularities and local curvature conferring to some of the carbons a favorable partial negative charge or a sp3 hybridization suitable for C–H bond formation. When GO covers the cathode of a water splitting cell powered at 1.7¿V, we demonstrate an effective hydrogen chemisorption exhibiting a logarithmic growth with time. Such GO undergoes a dynamic evolution, combining a continuous change in the local corrugation and partial charge distribution with deoxygenation, opening additional sites for hydrogen chemisorption. Using density functional theory combined with the experimental parameters we can monitor the H atom gravimetric density increase as the water splitting experiment takes place.
CitacióCiammaruchi, L. [et al.]. Water splitting for hydrogen chemisorption in graphene oxide dynamically evolving to a graphane character lattice. "Carbon", 1 Novembre 2019, vol. 153, p. 234-241.
ISSN0008-6223
Versió de l'editorhttps://www.sciencedirect.com/science/article/pii/S0008622319306633
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paper_Ciammaruchi et al_Carbon_R1_no marks.pdf | 1,455Mb | Visualitza/Obre | ||
SI_Water splitt ... misorption_R1_no marks.pdf | 2,240Mb | Visualitza/Obre |