Next Article in Journal
Surface Oxidation of Supported Ni Particles and Its Impact on the Catalytic Performance during Dynamically Operated Methanation of CO2
Previous Article in Journal
A New Homo-Hexamer Mn-Containing Catalase from Geobacillus sp. WCH70
Previous Article in Special Issue
Recent Progress on the Synthesis of Graphene-Based Nanostructures as Counter Electrodes in DSSCs Based on Iodine/Iodide Electrolytes
Article Menu
Issue 9 (September) cover image

Export Article

Open AccessArticle

S- and N-Doped Graphene Nanomaterials for the Oxygen Reduction Reaction

Departamento de Química, Instituto Universitario de Materiales y Nanotecnología (IMN), Universidad de La Laguna (ULL), Apartado 456, 38200 La Laguna, Tenerife, Spain
Author to whom correspondence should be addressed.
Catalysts 2017, 7(9), 278;
Received: 17 August 2017 / Revised: 15 September 2017 / Accepted: 16 September 2017 / Published: 18 September 2017
(This article belongs to the Special Issue Graphene-Based Materials for Energy Conversion)
PDF [1937 KB, uploaded 19 September 2017]


In the current work, heteroatom-doped graphene materials containing different atomic ratios of nitrogen and sulphur were employed as electrocatalysts for the oxygen reduction reaction (ORR) in acidic and alkaline media. To this end, the hydrothermal route and different chemical reducing agents were employed to synthesize the catalytic materials. The physicochemical characterization of the catalysts was performed by several techniques, such as X-ray diffraction, Raman spectroscopy and elemental analysis; meanwhile, the electrochemical performance of the materials toward the ORR was analyzed by linear sweep voltammetry (LSV), rotating disk electrode (RDE) and rotating ring-disk electrode (RRDE) techniques. The main results indicate that the ORR using heteroatom-doped graphene is a direct four-electron pathway, for which the catalytic activity is higher in alkaline than in acidic media. Indeed, a change of the reaction mechanism was observed with the insertion of N into the graphenic network, by the rate determining step changes from the first electrochemical step (formation of adsorbed OOH) on glassy carbon to the removal of adsorbed O (Oad) from the N-graphene surface. Moreover, the addition of sulphur atoms into the N-graphene structure increases the catalytic activity toward the ORR, as the desorption of Oad is accelerated. View Full-Text
Keywords: heteroatom-doped graphene; oxygen reduction reaction; fuel cells; rotating ring-disk electrode; electrocatalysis heteroatom-doped graphene; oxygen reduction reaction; fuel cells; rotating ring-disk electrode; electrocatalysis

Figure 1

This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).

Share & Cite This Article

MDPI and ACS Style

Rivera, L.M.; Fajardo, S.; Arévalo, M.D.C.; García, G.; Pastor, E. S- and N-Doped Graphene Nanomaterials for the Oxygen Reduction Reaction. Catalysts 2017, 7, 278.

Show more citation formats Show less citations formats

Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Related Articles

Article Metrics

Article Access Statistics



[Return to top]
Catalysts EISSN 2073-4344 Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert
Back to Top