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Understanding the structure and electronic properties of N-doped graphene nanoribbons upon hydrogen saturation

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Abstract

Structures and electronic properties of zigzag graphene nanoribbon (ZGNR) with pyridine (3NV-ZGNR) functionalized by Scandium (Sc) at the edge were studied through quantum chemical calculations in the formalism of density-functional theory (DFT). Pyridine-like nitrogen defects is very crucial for enhancing the Sc atom binding to the defects and is thermodynamically favoured. During Sc decoration of ZGNR there is a shift from 0.35 eV small gap semiconductor regime to that of a metal which can be used for band gap tuning by controlled saturation of Sc. ZGNR decorated with Sc can attract H2. Upon saturation of multiple H2 in quasi-molecular fashion, the metallic character is converted to semiconductors of small gap of 0.10 eV, which are predicted to be interesting materials not only for hydrogen storage but also for their band gap engineered properties.

Scandium decoration of zigzag graphene nanoribbon with pyridine can attract H2 and upon saturation of multiple H2 in quasi-molecular fashion the metallic character is converted to small gap semiconductor of 0.10 eV, predicted to be interesting materials not only for hydrogen storage but also for their band engineering properties.

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Acknowledgement

This work was supported in part by the Department of Science and Technology, Philippine Council for Industry, Energy and Emerging Technology Research and Development (PCIEERD) formerly Philippine Council for Advanced Science and Technology Research and Development (DOST, PCASTRD) and De La Salle University Manila for the acquisition of the Dmol 3 v6.0 software.

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  1. Department of Chemical Engineering, De La Salle University, 2401 Taft Ave, Manila, 1004, Philippines

    MICHAEL MANANGHAYA

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  1. MICHAEL MANANGHAYA
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Correspondence to MICHAEL MANANGHAYA.

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MANANGHAYA, M. Understanding the structure and electronic properties of N-doped graphene nanoribbons upon hydrogen saturation. J Chem Sci 126, 1737–1742 (2014). https://doi.org/10.1007/s12039-014-0744-3

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  • DOI: https://doi.org/10.1007/s12039-014-0744-3

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