Secondary Impact of Manganese on the Catalytic Properties of Nitrogen-Doped Graphene in the Hydrogen Evolution Reaction

Bayati, Maryam and Scott, Keith (2017) Secondary Impact of Manganese on the Catalytic Properties of Nitrogen-Doped Graphene in the Hydrogen Evolution Reaction. ChemCatChem, 9 (21). pp. 4049-4052. ISSN 1867-3880

[img]
Preview
Text
Bayati_et_al-2017-ChemCatChem.pdf - Accepted Version

Download (5MB) | Preview
Official URL: https://doi.org/10.1002/cctc.201700744

Abstract

Catalysts play a key role in hydrogen production as green energy carriers. We show herein for the first time that manganese impurities in graphene can improve the catalytic activity of synthesized N‐doped graphene (NG) for the hydrogen evolution reaction in acid media by influencing the ratio of different N‐functionalities. A 122 mV improvement in the overpotential was found following the Mn impregnation of graphene. Transmission electron microscopy images confirmed the formation of manganese oxide nanoparticles on the NG sheets. X‐ray photoelectron spectroscopy revealed structural alteration in favor of higher quantities of quaternary and pyrrolic nitrogen functionalities, from approximately 37 % in NG to 84 % in the Mn‐inserted‐doped graphene catalyst. This enhanced catalytic performance, based on density functional theory calculations in the literature, was attributed to an increase in the number of active sites with higher activity.

Item Type: Article
Uncontrolled Keywords: Doping, graphene, hydrogen, manganese, nanoparticles
Subjects: F100 Chemistry
F200 Materials Science
H800 Chemical, Process and Energy Engineering
Department: Faculties > Engineering and Environment > Mechanical and Construction Engineering
Depositing User: Elena Carlaw
Date Deposited: 28 May 2020 15:06
Last Modified: 28 May 2020 15:15
URI: http://nrl.northumbria.ac.uk/id/eprint/43268

Actions (login required)

View Item View Item

Downloads

Downloads per month over past year

View more statistics