Secondary Impact of Manganese on Catalytic Property of N‐Doped Graphene in the Hydrogen Evolution Reaction

Maryam Bayati, Keith Scott

Research output: Contribution to journalComment/debatepeer-review

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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.
Original languageEnglish
Pages (from-to)4049–4052
Number of pages4
JournalChemCatChem
Volume9
Issue number21
Early online date25 Sep 2017
DOIs
Publication statusPublished - 9 Nov 2017
Externally publishedYes

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