Evaluation of electrochemical hydrogen storage capability of three-dimensional nano-structured nitrogen-doped graphene

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Aghajani, Hossein and Taghizadeh Tabrizi, Arvin and Ghorbani, Reza and Behrangi, Sahand and Stupavska, Monika and Abdian, Nesa (2022) Evaluation of electrochemical hydrogen storage capability of three-dimensional nano-structured nitrogen-doped graphene. Journal of Alloys and Compounds, 906 . ISSN 0925-8388 (Print) 1873-4669 (Online)

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Abstract

In this work, nitrogen-doped graphene foam was synthesized by using hydrothermal routes. In the first step, graphene was synthesized by utilizing a modified Hummer's method and nitrogen-doped graphene foam was then synthesized at 180 °C by using an ammonia and graphene solution for 12 h. X-ray photon spectroscopy (XPS) was applied to determine the extent of doping by nitrogen on the graphene foam; three N-peaks were observed at 398.25, 399.69, and 401.46 eV, and XPS also showed that 6 at% of the synthesized graphene foam consisted of nitrogen atoms. The capability of this foam to absorb hydrogen was evaluated in a 6 M KOH solution through electrochemical impedance spectroscopy (EIS), galvanostatic charge/discharge, and cyclic voltammetry (CV) analysis. The hydrogen storage capacity of the achieved N-doped GF, showing the value of 1916.5 mAh.g−1 significantly improved in comparison to that of pure graphene in previous work, due to the increasing electronegative sites at the surface of the graphene foam.
Item Type: Article
Uncontrolled Keywords: Electrochemical Impedance Spectroscopy; Hydrogen Storage; N-doped Graphene Foam; Nanostructure; XPS
Divisions: Integrated Manufacturing Technologies Research and Application Center
Depositing User: Arvin Taghizadeh Tabrizi
Date Deposited: 24 Aug 2022 23:02
Last Modified: 24 Aug 2022 23:02
URI: https://research.sabanciuniv.edu/id/eprint/44038

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