Synthesis of anatase TiO2 with exposed (001) facets grown on N-doped reduced graphene oxide for enhanced hydrogen storage

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Gohari-Bajestani, Zahra and Akhlaghi, Omid and Yürüm, Yuda and Yürüm, Alp (2017) Synthesis of anatase TiO2 with exposed (001) facets grown on N-doped reduced graphene oxide for enhanced hydrogen storage. International Journal of Hydrogen Energy, 42 (9). pp. 6096-6103. ISSN 0360-3199 (Print) 1879-3487 (Online)

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Abstract

Homogeneously distributed TiO2 nanoparticles with (001) reactive facets were grown over nitrogen-doped reduced graphene oxide sheets (N-rGO) under solvothermal conditions. Hydrogen storage capacity of the system was significantly improved to 0.91 wt% at room temperature and pressure of 0.8 MPa that is the highest hydrogen storage ever reported for graphene-based nanocomposites at room temperature and low pressures. Importantly, this nanocomposite exhibits ~91% capacity retention through 5 cycles with more than 88% release of the stored hydrogen at ambient conditions. Enhanced hydrogen uptake and capacity retention were attributed to the synergistic effect of i) reactive facets of TiO2, ii)high dispersion of nanoparticles with the average size of 6 nm, and iii) strong interaction between substrate and TiO2 nanoparticles through polarized CeN bonding of N-rGO sheets.
Item Type: Article
Uncontrolled Keywords: Graphene; Nitrogen-doping; TiO2; (001) facet; Hydrogen adsorption
Subjects: Q Science > QD Chemistry
Divisions: Sabancı University Nanotechnology Research and Application Center
Faculty of Engineering and Natural Sciences > Academic programs > Materials Science & Eng.
Faculty of Engineering and Natural Sciences
Depositing User: Zahra Goharibajestani
Date Deposited: 15 May 2017 10:35
Last Modified: 26 Apr 2022 09:43
URI: https://research.sabanciuniv.edu/id/eprint/31330

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